diff --git a/Cargo.lock b/Cargo.lock
index caeb8b0..bf209d4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -50,6 +50,121 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
 
+[[package]]
+name = "ascii-canvas"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8824ecca2e851cec16968d54a01dd372ef8f95b244fb84b84e70128be347c3c6"
+dependencies = [
+ "term",
+]
+
+[[package]]
+name = "assert-json-diff"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47e4f2b81832e72834d7518d8487a0396a28cc408186a2e8854c0f98011faf12"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "async-channel"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf46fee83e5ccffc220104713af3292ff9bc7c64c7de289f66dae8e38d826833"
+dependencies = [
+ "concurrent-queue",
+ "event-listener",
+ "futures-core",
+]
+
+[[package]]
+name = "async-executor"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17adb73da160dfb475c183343c8cccd80721ea5a605d3eb57125f0a7b7a92d0b"
+dependencies = [
+ "async-lock",
+ "async-task",
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "slab",
+]
+
+[[package]]
+name = "async-global-executor"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1b6f5d7df27bd294849f8eec66ecfc63d11814df7a4f5d74168a2394467b776"
+dependencies = [
+ "async-channel",
+ "async-executor",
+ "async-io",
+ "async-lock",
+ "blocking",
+ "futures-lite",
+ "once_cell",
+]
+
+[[package]]
+name = "async-io"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c374dda1ed3e7d8f0d9ba58715f924862c63eae6849c92d3a18e7fbde9e2794"
+dependencies = [
+ "async-lock",
+ "autocfg",
+ "concurrent-queue",
+ "futures-lite",
+ "libc",
+ "log",
+ "parking",
+ "polling",
+ "slab",
+ "socket2",
+ "waker-fn",
+ "windows-sys 0.42.0",
+]
+
+[[package]]
+name = "async-lock"
+version = "2.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa24f727524730b077666307f2734b4a1a1c57acb79193127dcc8914d5242dd7"
+dependencies = [
+ "event-listener",
+]
+
+[[package]]
+name = "async-object-pool"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aeb901c30ebc2fc4ab46395bbfbdba9542c16559d853645d75190c3056caf3bc"
+dependencies = [
+ "async-std",
+]
+
+[[package]]
+name = "async-process"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6381ead98388605d0d9ff86371043b5aa922a3905824244de40dc263a14fcba4"
+dependencies = [
+ "async-io",
+ "async-lock",
+ "autocfg",
+ "blocking",
+ "cfg-if",
+ "event-listener",
+ "futures-lite",
+ "libc",
+ "signal-hook",
+ "windows-sys 0.42.0",
+]
+
 [[package]]
 name = "async-recursion"
 version = "1.0.2"
@@ -61,6 +176,56 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "async-std"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62565bb4402e926b29953c785397c6dc0391b7b446e45008b0049eb43cec6f5d"
+dependencies = [
+ "async-channel",
+ "async-global-executor",
+ "async-io",
+ "async-lock",
+ "async-process",
+ "crossbeam-utils",
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-lite",
+ "gloo-timers",
+ "kv-log-macro",
+ "log",
+ "memchr",
+ "once_cell",
+ "pin-project-lite",
+ "pin-utils",
+ "slab",
+ "wasm-bindgen-futures",
+]
+
+[[package]]
+name = "async-task"
+version = "4.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a40729d2133846d9ed0ea60a8b9541bccddab49cd30f0715a1da672fe9a2524"
+
+[[package]]
+name = "async-trait"
+version = "0.1.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b84f9ebcc6c1f5b8cb160f6990096a5c127f423fcb6e1ccc46c370cbdfb75dfc"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "atomic-waker"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "debc29dde2e69f9e47506b525f639ed42300fc014a3e007832592448fa8e4599"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -93,12 +258,44 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "base64"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+
 [[package]]
 name = "base64"
 version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
+[[package]]
+name = "basic-cookies"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb53b6b315f924c7f113b162e53b3901c05fc9966baf84d201dfcc7432a4bb38"
+dependencies = [
+ "lalrpop",
+ "lalrpop-util",
+ "regex",
+]
+
+[[package]]
+name = "bit-set"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -114,6 +311,20 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "blocking"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c67b173a56acffd6d2326fb7ab938ba0b00a71480e14902b2591c87bc5741e8"
+dependencies = [
+ "async-channel",
+ "async-lock",
+ "async-task",
+ "atomic-waker",
+ "fastrand",
+ "futures-lite",
+]
+
 [[package]]
 name = "bstr"
 version = "1.3.0"
@@ -196,6 +407,12 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "castaway"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2698f953def977c68f935bb0dfa959375ad4638570e969e2f1e9f433cbf1af6"
+
 [[package]]
 name = "cc"
 version = "1.0.79"
@@ -304,6 +521,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "concurrent-queue"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c278839b831783b70278b14df4d45e1beb1aad306c07bb796637de9a0e323e8e"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -415,6 +641,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "crunchy"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -425,6 +657,47 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "ctor"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d2301688392eb071b0bf1a37be05c469d3cc4dbbd95df672fe28ab021e6a096"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "curl"
+version = "0.4.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "509bd11746c7ac09ebd19f0b17782eae80aadee26237658a6b4808afb5c11a22"
+dependencies = [
+ "curl-sys",
+ "libc",
+ "openssl-probe",
+ "openssl-sys",
+ "schannel",
+ "socket2",
+ "winapi",
+]
+
+[[package]]
+name = "curl-sys"
+version = "0.4.60+curl-7.88.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "717abe2cb465a5da6ce06617388a3980c9a2844196734bec8ccb8e575250f13f"
+dependencies = [
+ "cc",
+ "libc",
+ "libnghttp2-sys",
+ "libz-sys",
+ "openssl-sys",
+ "pkg-config",
+ "vcpkg",
+ "winapi",
+]
+
 [[package]]
 name = "cxx"
 version = "1.0.92"
@@ -484,6 +757,12 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "850878694b7933ca4c9569d30a34b55031b9b139ee1fc7b94a527c4ef960d690"
 
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
 [[package]]
 name = "digest"
 version = "0.10.6"
@@ -503,6 +782,16 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if",
+ "dirs-sys-next",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.7"
@@ -514,6 +803,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.11"
@@ -526,6 +826,15 @@ version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
+[[package]]
+name = "ena"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2e5d13ca2353ab7d0230988629def93914a8c4015f621f9b13ed2955614731d"
+dependencies = [
+ "log",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.32"
@@ -566,6 +875,12 @@ dependencies = [
  "str-buf",
 ]
 
+[[package]]
+name = "event-listener"
+version = "2.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -597,6 +912,12 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "fixedbitset"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
+
 [[package]]
 name = "flate2"
 version = "1.0.25"
@@ -686,6 +1007,21 @@ version = "0.3.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89d422fa3cbe3b40dca574ab087abb5bc98258ea57eea3fd6f1fa7162c778b91"
 
+[[package]]
+name = "futures-lite"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7694489acd39452c77daa48516b894c153f192c3578d5a839b62c58099fcbf48"
+dependencies = [
+ "fastrand",
+ "futures-core",
+ "futures-io",
+ "memchr",
+ "parking",
+ "pin-project-lite",
+ "waker-fn",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.27"
@@ -778,6 +1114,18 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "gloo-timers"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b995a66bb87bebce9a0f4a95aed01daca4872c050bfcb21653361c03bc35e5c"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "gpt-cli"
 version = "0.0.12"
@@ -788,6 +1136,7 @@ dependencies = [
  "futures",
  "grcov",
  "hex",
+ "httpmock",
  "inquire",
  "rand",
  "reqwest",
@@ -932,6 +1281,34 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
+[[package]]
+name = "httpmock"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6b56b6265f15908780cbee987912c1e98dbca675361f748291605a8a3a1df09"
+dependencies = [
+ "assert-json-diff",
+ "async-object-pool",
+ "async-trait",
+ "base64 0.13.1",
+ "basic-cookies",
+ "crossbeam-utils",
+ "form_urlencoded",
+ "futures-util",
+ "hyper",
+ "isahc",
+ "lazy_static",
+ "levenshtein",
+ "log",
+ "regex",
+ "serde",
+ "serde_json",
+ "serde_regex",
+ "similar",
+ "tokio",
+ "url",
+]
+
 [[package]]
 name = "humansize"
 version = "2.1.3"
@@ -1089,6 +1466,42 @@ version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30e22bd8629359895450b59ea7a776c850561b96a3b1d31321c1949d9e6c9146"
 
+[[package]]
+name = "isahc"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "334e04b4d781f436dc315cb1e7515bd96826426345d498149e4bde36b67f8ee9"
+dependencies = [
+ "async-channel",
+ "castaway",
+ "crossbeam-utils",
+ "curl",
+ "curl-sys",
+ "encoding_rs",
+ "event-listener",
+ "futures-lite",
+ "http",
+ "log",
+ "mime",
+ "once_cell",
+ "polling",
+ "slab",
+ "sluice",
+ "tracing",
+ "tracing-futures",
+ "url",
+ "waker-fn",
+]
+
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.6"
@@ -1104,12 +1517,59 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "kv-log-macro"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0de8b303297635ad57c9f5059fd9cee7a47f8e8daa09df0fcd07dd39fb22977f"
+dependencies = [
+ "log",
+]
+
+[[package]]
+name = "lalrpop"
+version = "0.19.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b30455341b0e18f276fa64540aff54deafb54c589de6aca68659c63dd2d5d823"
+dependencies = [
+ "ascii-canvas",
+ "atty",
+ "bit-set",
+ "diff",
+ "ena",
+ "itertools",
+ "lalrpop-util",
+ "petgraph",
+ "pico-args",
+ "regex",
+ "regex-syntax",
+ "string_cache",
+ "term",
+ "tiny-keccak",
+ "unicode-xid",
+]
+
+[[package]]
+name = "lalrpop-util"
+version = "0.19.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcf796c978e9b4d983414f4caedc9273aa33ee214c5b887bd55fde84c85d2dc4"
+dependencies = [
+ "regex",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "levenshtein"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
+
 [[package]]
 name = "libc"
 version = "0.2.140"
@@ -1122,6 +1582,16 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
 
+[[package]]
+name = "libnghttp2-sys"
+version = "0.1.7+1.45.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57ed28aba195b38d5ff02b9170cbff627e336a20925e43b4945390401c5dc93f"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "libz-sys"
 version = "1.1.8"
@@ -1129,6 +1599,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
 dependencies = [
  "cc",
+ "libc",
  "pkg-config",
  "vcpkg",
 ]
@@ -1165,6 +1636,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
  "cfg-if",
+ "value-bag",
 ]
 
 [[package]]
@@ -1254,6 +1726,12 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "new_debug_unreachable"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
+
 [[package]]
 name = "newline-converter"
 version = "0.2.2"
@@ -1372,6 +1850,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "parking"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "427c3892f9e783d91cc128285287e70a59e206ca452770ece88a76f7a3eddd72"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
@@ -1454,6 +1938,16 @@ dependencies = [
  "sha2",
 ]
 
+[[package]]
+name = "petgraph"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dd7d28ee937e54fe3080c91faa1c3a46c06de6252988a7f4592ba2310ef22a4"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]
+
 [[package]]
 name = "phf"
 version = "0.10.1"
@@ -1493,6 +1987,32 @@ dependencies = [
  "uncased",
 ]
 
+[[package]]
+name = "pico-args"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db8bcd96cb740d03149cbad5518db9fd87126a10ab519c011893b1754134c468"
+
+[[package]]
+name = "pin-project"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad29a609b6bcd67fee905812e544992d216af9d755757c05ed2d0e15a74c6ecc"
+dependencies = [
+ "pin-project-internal",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "069bdb1e05adc7a8990dce9cc75370895fbe4e3d58b9b73bf1aee56359344a55"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.9"
@@ -1511,12 +2031,34 @@ version = "0.3.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
 
+[[package]]
+name = "polling"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e1f879b2998099c2d69ab9605d145d5b661195627eccc680002c4918a7fb6fa"
+dependencies = [
+ "autocfg",
+ "bitflags",
+ "cfg-if",
+ "concurrent-queue",
+ "libc",
+ "log",
+ "pin-project-lite",
+ "windows-sys 0.45.0",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
+[[package]]
+name = "precomputed-hash"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -1672,7 +2214,7 @@ version = "0.11.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "21eed90ec8570952d53b772ecf8f206aa1ec9a3d76b2521c56c42973f2d91ee9"
 dependencies = [
- "base64",
+ "base64 0.21.0",
  "bytes",
  "encoding_rs",
  "futures-core",
@@ -1747,6 +2289,12 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f3208ce4d8448b3f3e7d168a73f5e0c43a61e32930de3bceeccedb388b6bf06"
+
 [[package]]
 name = "ryu"
 version = "1.0.13"
@@ -1846,6 +2394,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_regex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8136f1a4ea815d7eac4101cfd0b16dc0cb5e1fe1b8609dfd728058656b7badf"
+dependencies = [
+ "regex",
+ "serde",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -1899,6 +2457,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "similar"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "420acb44afdae038210c99e69aae24109f32f15500aa708e81d46c9f29d55fcf"
+
 [[package]]
 name = "simplelog"
 version = "0.12.1"
@@ -1934,6 +2498,17 @@ dependencies = [
  "deunicode",
 ]
 
+[[package]]
+name = "sluice"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d7400c0eff44aa2fcb5e31a5f24ba9716ed90138769e4977a2ba6014ae63eb5"
+dependencies = [
+ "async-channel",
+ "futures-core",
+ "futures-io",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.10.0"
@@ -1962,6 +2537,19 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e08d8363704e6c71fc928674353e6b7c23dcea9d82d7012c8faf2a3a025f8d0"
 
+[[package]]
+name = "string_cache"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f91138e76242f575eb1d3b38b4f1362f10d3a43f47d182a5b359af488a02293b"
+dependencies = [
+ "new_debug_unreachable",
+ "once_cell",
+ "parking_lot",
+ "phf_shared",
+ "precomputed-hash",
+]
+
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -2099,6 +2687,17 @@ dependencies = [
  "unic-segment",
 ]
 
+[[package]]
+name = "term"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c59df8ac95d96ff9bede18eb7300b0fda5e5d8d90960e76f8e14ae765eedbf1f"
+dependencies = [
+ "dirs-next",
+ "rustversion",
+ "winapi",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"
@@ -2204,6 +2803,15 @@ dependencies = [
  "time-core",
 ]
 
+[[package]]
+name = "tiny-keccak"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c9d3793400a45f954c52e73d068316d76b6f4e36977e3fcebb13a2721e80237"
+dependencies = [
+ "crunchy",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
@@ -2296,10 +2904,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
 dependencies = [
  "cfg-if",
+ "log",
  "pin-project-lite",
+ "tracing-attributes",
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-attributes"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4017f8f45139870ca7e672686113917c71c7a6e02d4924eda67186083c03081a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tracing-core"
 version = "0.1.30"
@@ -2309,6 +2930,16 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "tracing-futures"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
+dependencies = [
+ "pin-project",
+ "tracing",
+]
+
 [[package]]
 name = "try-lock"
 version = "0.2.4"
@@ -2445,6 +3076,16 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "value-bag"
+version = "1.0.0-alpha.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2209b78d1249f7e6f3293657c9779fe31ced465df091bbd433a1cf88e916ec55"
+dependencies = [
+ "ctor",
+ "version_check",
+]
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -2463,6 +3104,12 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "waker-fn"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
+
 [[package]]
 name = "walkdir"
 version = "2.3.2"
diff --git a/Cargo.toml b/Cargo.toml
index 68a67d5..1c07a8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,8 +24,9 @@ reqwest = { version = "0.11", features = ["json"] }
 futures = "0.3.27"
 tokio = { version = "1.26.0", features = ["full"] }
 inquire = { version = "0.6.0" }
-terminal-clipboard="0.3.1"
+terminal-clipboard = "0.3.1"
 async-recursion = "1.0.2"
 
 [dev-dependencies]
-grcov = "*"
+grcov = "0.8.13"
+httpmock="0.6.7"
diff --git a/src/gpt3.rs b/src/gpt3.rs
index 51b128c..5aa73e7 100644
--- a/src/gpt3.rs
+++ b/src/gpt3.rs
@@ -8,21 +8,31 @@ use std::time::Duration;
 pub(crate) struct Gpt {
     debug: bool,
     api_key: String,
+    openapi_host: String,
 }
 
 impl Gpt {
-    pub(crate) fn new(debug: Option<bool>) -> Self {
+    const OPEN_AI_HOST: &'static str = "https://api.openai.com";
+
+    pub(crate) fn new(debug: Option<bool>, openapi_host: Option<&str>) -> Self {
         let api_key = match std::env::var("GPT3_API_KEY") {
             Ok(val) => val,
             Err(_) => String::from(""),
         };
 
+        let openapi_host = String::from(openapi_host.unwrap_or(Gpt::OPEN_AI_HOST));
+
         Self {
             api_key,
             debug: debug.unwrap_or(false),
+            openapi_host,
         }
     }
 
+    pub fn is_open_ai(&self) -> bool {
+        self.openapi_host == Gpt::OPEN_AI_HOST
+    }
+
     pub(crate) fn get_system_prompt() -> String {
         match std::env::var("GPT_SYSTEM_PROMPT") {
             Ok(val) => val,
@@ -42,6 +52,8 @@ impl Gpt {
 
     #[async_recursion]
     pub(crate) async fn ask(&self, messages: Vec<Gpt3Message>) -> Result<Gpt3Response, String> {
+        let base_url = format!("{}/v1/chat/completions", self.openapi_host);
+
         if self.debug {
             let response = Gpt3Response {
                 id: "chatcmpl-6taJ9NwJAFdKNafz0Y49j5ga0jFiF".to_string(),
@@ -70,9 +82,11 @@ impl Gpt {
         let mut cache = Cache::new(None);
         let key = serde_json::to_string(&messages).unwrap();
 
-        if let Some(cached_data) = cache.get(&key) {
-            let response: Gpt3Response = serde_json::from_str(&cached_data).unwrap();
-            return Ok(response);
+        if self.is_open_ai() {
+            if let Some(cached_data) = cache.get(&key) {
+                let response: Gpt3Response = serde_json::from_str(&cached_data).unwrap();
+                return Ok(response);
+            }
         }
 
         let data = json!({
@@ -81,7 +95,7 @@ impl Gpt {
         });
 
         let response = reqwest::Client::new()
-            .post("https://api.openai.com/v1/chat/completions")
+            .post(base_url)
             .header("Content-Type", "application/json")
             .header("Authorization", format!("Bearer {}", self.api_key))
             .json(&data)
@@ -97,11 +111,14 @@ impl Gpt {
                 .json::<Gpt3Response>()
                 .await
                 .map_err(|e| format!("{e}"))?;
+
             // Use the parsed data
             match json.choices[0].finish_reason.as_deref() {
                 Some("stop") | Some("") | None => {
                     let response_str = serde_json::to_string(&json).unwrap();
-                    cache.set(&key, &response_str);
+                    if self.is_open_ai() {
+                        cache.set(&key, &response_str);
+                    }
                 }
                 Some(_) => {
                     println!("{:?}", json.choices[0]);
@@ -110,23 +127,15 @@ impl Gpt {
 
             Ok(json)
         } else if status == reqwest::StatusCode::TOO_MANY_REQUESTS {
-            // Get the error response body as a string
             let error_body = response.text().await.map_err(|e| format!("{e}"))?;
-            // Parse the JSON error response
             let error_json = serde_json::from_str::<serde_json::Value>(&error_body)
                 .map_err(|e| format!("{e}"))?;
-            // Extract the error message and recommended wait time
-            // let error_message = error_json["message"].as_str().unwrap_or_default();
             let seconds_to_wait = error_json["seconds_to_wait"].as_u64().unwrap_or_default();
-            // Print the error message
-            // Err(format!("Request failed with status code: {}\nError message: {}\nRecommended wait time: {} seconds", status, error_message, seconds_to_wait))
             thread::sleep(Duration::from_secs(seconds_to_wait));
 
             self.ask(messages).await
         } else {
-            // Get the error response body as a string
             let error_body = response.text().await.map_err(|e| format!("{e}"))?;
-            // Print the error message
             Err(format!(
                 "Request failed with status code: {}\nError response body: {}",
                 status, error_body
@@ -195,7 +204,7 @@ mod tests {
     #[test]
     fn test_ask_with_env_var_and_debug_true() {
         std::env::set_var("GPT3_API_KEY", "test_key");
-        let gpt = Gpt::new(Some(true));
+        let gpt = Gpt::new(Some(true), None);
         let messages = vec![Gpt3Message {
             content: "hello".to_string(),
             role: "user".to_string(),
@@ -212,7 +221,7 @@ mod tests {
     #[test]
     fn test_ask_without_env_var() {
         std::env::remove_var("GPT3_API_KEY");
-        let gpt = Gpt::new(Some(false));
+        let gpt = Gpt::new(Some(false), None);
         let messages = vec![Gpt3Message {
             content: "hello".to_string(),
             role: "user".to_string(),
@@ -223,4 +232,68 @@ mod tests {
         let error = result.unwrap_err();
         assert!(error.contains("Error: GPT3_API_KEY environment variable is not defined."));
     }
+
+    #[tokio::test]
+    async fn test_http_mock() {
+        let server = httpmock::MockServer::start();
+
+        let mock = server.mock(|when, then| {
+            when.path("/hi");
+            then.status(200);
+        });
+
+        let response = reqwest::get(format!("{}/hi", server.url("")))
+            .await
+            .unwrap();
+
+        assert_eq!(response.status(), 200);
+        mock.assert();
+    }
+
+    #[tokio::test]
+    async fn test_ask_success() {
+        let server = httpmock::MockServer::start();
+
+        let mock = server.mock(|when, then| {
+            when.method(httpmock::Method::POST)
+                .path("/v1/chat/completions");
+            then.status(200).json_body_obj(&json!({
+                "id": "testid",
+                "object": "chat.completion",
+                "created": 1678705627,
+                "model": "gpt-3.5-turbo-0301",
+                "usage": { "prompt_tokens": 45, "completion_tokens": 3, "total_tokens": 48 },
+                "choices": [
+                    {
+                        "message": { "role": "assistant", "content": "npx ncu -i" },
+                        "finish_reason": "stop",
+                        "index": 0
+                    }
+                ]
+            }));
+        });
+
+        std::env::set_var("GPT3_API_KEY", "test_key");
+        let gpt = Gpt::new(Some(false), Some(&server.url("")));
+        let messages = vec![
+            Gpt3Message {
+                role: "system".to_string(),
+                content: Gpt::get_system_prompt(),
+            },
+            Gpt3Message {
+                role: "user".to_string(),
+                content: "Update all npm packages to the latest version.".to_string(),
+            },
+        ];
+
+        // Call
+        let response = gpt.ask(messages).await.unwrap();
+
+        // Assert
+        assert_eq!(
+            response.choices[0].message.content,
+            "npx ncu -i".to_string()
+        );
+        mock.assert();
+    }
 }
diff --git a/src/main.rs b/src/main.rs
index 4343336..fe0b563 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -86,8 +86,8 @@ mod tests {
 
     #[test]
     fn test_get_postprocess_action_env_out() {
-        env::set_var("GPT_POST", "out");
         let answer = "This is a normal answer.".to_string();
+        env::set_var("GPT_POST", "out");
         let action = get_postprocess_action(&answer);
         assert_eq!(action, PostprocessAction::Out);
     }
@@ -157,7 +157,7 @@ async fn async_main() {
     let rt = Runtime::new().unwrap();
 
     rt.block_on(async {
-        let client = gpt3::Gpt::new(Some(false));
+        let client = gpt3::Gpt::new(Some(false), None);
         let response = client
             .ask(vec![
                 Gpt3Message {