diff --git a/libs/langchain_v1/pyproject.toml b/libs/langchain_v1/pyproject.toml index 128b4527c8..4be2ec5e8e 100644 --- a/libs/langchain_v1/pyproject.toml +++ b/libs/langchain_v1/pyproject.toml @@ -49,7 +49,7 @@ deepseek = ["langchain-deepseek"] xai = ["langchain-xai"] perplexity = ["langchain-perplexity"] meta = ["langchain-meta"] -mcp = ["fastmcp-slim[client]>=3.0.0,<5.0.0"] +mcp = ["fastmcp-slim[client]>=4.0.0b4,<5.0.0"] [project.urls] Homepage = "https://docs.langchain.com/" @@ -76,7 +76,7 @@ test = [ "blockbuster>=1.5.26,<1.6.0", "langchain-tests>=1.1.9,<2.0.0", "langchain-openai", - "fastmcp>=3.0.0,<5.0.0", + "fastmcp>=4.0.0b4,<5.0.0", ] lint = [ "ruff>=0.15.0,<0.17.0", @@ -84,7 +84,7 @@ lint = [ typing = [ "mypy>=2.1.0,<2.2.0", "types-toml>=0.10.8.20240310,<1.0.0.0", - "fastmcp>=3.0.0,<5.0.0", + "fastmcp>=4.0.0b4,<5.0.0", ] test_integration = [ @@ -97,6 +97,8 @@ test_integration = [ [tool.uv] constraint-dependencies = ["urllib3>=2.6.3", "pygments>=2.20.0"] +# FastMCP 4 is still in beta; allow its prerelease to resolve. +prerelease = "allow" [tool.uv.sources] langchain-core = { path = "../core", editable = true } diff --git a/libs/langchain_v1/uv.lock b/libs/langchain_v1/uv.lock index 3a55cf5c86..d9ff2c6590 100644 --- a/libs/langchain_v1/uv.lock +++ b/libs/langchain_v1/uv.lock @@ -16,6 +16,9 @@ resolution-markers = [ "python_full_version < '3.11' and platform_python_implementation == 'PyPy'", ] +[options] +prerelease-mode = "allow" + [manifest] constraints = [ { name = "pygments", specifier = ">=2.20.0" }, @@ -1172,21 +1175,22 @@ wheels = [ [[package]] name = "fastmcp" -version = "3.4.7" +version = "4.0.0b4" source = { registry = "https://pypi.org/simple" } dependencies = [ { name = "fastmcp-slim", extra = ["client", "server"] }, ] -sdist = { url = "https://files.pythonhosted.org/packages/62/dd/fd444d94ae7afdaf5b6dd168799d34023f576b405872d6a27d5686a9d1f4/fastmcp-3.4.7.tar.gz", hash = "sha256:43117aca886f5ee2f6a569bba91cef02b59c339aad04ba29950ff18d251c822a", size = 28808982, upload-time = "2026-08-10T21:17:55.045Z" } +sdist = { url = "https://files.pythonhosted.org/packages/cd/a1/032858e40579c3047ac6f3eb1e97b59db7ad649234d55094a9bcf2d560c1/fastmcp-4.0.0b4.tar.gz", hash = "sha256:e3a8b0f4a8300b3da15584e7bff62d464fa5458b52903d86a6a2e149c61c3edb", size = 42180304, upload-time = "2026-08-26T22:59:07.827Z" } wheels = [ - { url = "https://files.pythonhosted.org/packages/ac/14/6d950459cc831fa17fe2d1797926b6eb2d2f2af50f830e62d0c098cc1ec8/fastmcp-3.4.7-py3-none-any.whl", hash = "sha256:e4e7698cb4af5bc667b1901685261fa2f3526dc73d243a461fca42500c8dbe56", size = 8016, upload-time = "2026-08-10T21:17:51.391Z" }, + { url = "https://files.pythonhosted.org/packages/65/11/132d9030c8b3235784352e7132286bf2e4d010f4f295ba4b4ccf2c44ebd1/fastmcp-4.0.0b4-py3-none-any.whl", hash = "sha256:2996abab765172bfcf2e7d4bdde77438390ecd79af5b5a3af586e97eedf8f5e4", size = 8088, upload-time = "2026-08-26T22:59:04.265Z" }, ] [[package]] name = "fastmcp-slim" -version = "3.4.7" +version = "4.0.0b4" source = { registry = "https://pypi.org/simple" } dependencies = [ + { name = "mcp-types" }, { name = "platformdirs" }, { name = "pydantic", extra = ["email"] }, { name = "pydantic-settings" }, @@ -1194,16 +1198,16 @@ dependencies = [ { name = "rich" }, { name = "typing-extensions" }, ] -sdist = { url = "https://files.pythonhosted.org/packages/12/ac/7924e803368d0758ee4d6b1259066550df78f58f0f9f8bfebd5a123e957d/fastmcp_slim-3.4.7.tar.gz", hash = "sha256:06b32a358320a7dc2b2ee040ba89ea55ddc20763dff2949f384f7974b13b5d8f", size = 594357, upload-time = "2026-08-10T21:17:28.723Z" } +sdist = { url = "https://files.pythonhosted.org/packages/4c/1a/89f4ade73ba26c04b573464686a2bc656b1f910d3f92f6e0950971a7c64f/fastmcp_slim-4.0.0b4.tar.gz", hash = "sha256:9a57dfa7be461d6a65903f450af6e6b51d26266f50977bf7c30508fefaab8816", size = 679556, upload-time = "2026-08-26T22:58:39.69Z" } wheels = [ - { url = "https://files.pythonhosted.org/packages/b4/97/e0e53642cd029a9a7635ae9c548f9f2cc995af5914e487b3df795664e4be/fastmcp_slim-3.4.7-py3-none-any.whl", hash = "sha256:6c931a0089705f3f2935428ef9b2bc74ad94140adc64aab84d116d103e694b3a", size = 769370, upload-time = "2026-08-10T21:17:27.227Z" }, + { url = "https://files.pythonhosted.org/packages/15/7c/abf53a150e379563efc353e510ef412aae977929e7b289e1cd089002ffd3/fastmcp_slim-4.0.0b4-py3-none-any.whl", hash = "sha256:d20afd384efe388302d42280bdd2f5525af57d317e315f8e065a8de7517302b5", size = 852891, upload-time = "2026-08-26T22:58:38.348Z" }, ] [package.optional-dependencies] client = [ { name = "authlib" }, { name = "exceptiongroup" }, - { name = "httpx" }, + { name = "httpx2" }, { name = "mcp" }, { name = "opentelemetry-api" }, { name = "py-key-value-aio", extra = ["filetree", "keyring", "memory"] }, @@ -1214,7 +1218,7 @@ server = [ { name = "cyclopts" }, { name = "exceptiongroup" }, { name = "griffelib" }, - { name = "httpx" }, + { name = "httpx2" }, { name = "joserfc" }, { name = "jsonref" }, { name = "jsonschema-path" }, @@ -1892,6 +1896,19 @@ wheels = [ { url = "https://files.pythonhosted.org/packages/7e/f5/f66802a942d491edb555dd61e3a9961140fd64c90bce1eafd741609d334d/httpcore-1.0.9-py3-none-any.whl", hash = "sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55", size = 78784, upload-time = "2025-04-24T22:06:20.566Z" }, ] +[[package]] +name = "httpcore2" +version = "2.12.0" +source = { registry = "https://pypi.org/simple" } +dependencies = [ + { name = "h11" }, + { name = "truststore" }, +] +sdist = { url = "https://files.pythonhosted.org/packages/be/ad/f4f0e57345f1870f3e8cb624e058d7eca6e5a27d33bcc3311d9b618734cd/httpcore2-2.12.0.tar.gz", hash = "sha256:9293522bba0aa7c4c8e9e3f040c16575bd8868e155a77fa30c7a9085a5eae648", size = 67548, upload-time = "2026-08-18T13:22:08.211Z" } +wheels = [ + { url = "https://files.pythonhosted.org/packages/d2/74/d370e55600d9bcfa0d9794b0166126d49291a3d2b20c268fc98c453a4948/httpcore2-2.12.0-py3-none-any.whl", hash = "sha256:7e04258ce01013d7d615e5b910a3b27fac937d7a95038227e79652b4ba3b4ceb", size = 83074, upload-time = "2026-08-18T13:22:05.854Z" }, +] + [[package]] name = "httpx" version = "0.28.1" @@ -1929,6 +1946,32 @@ wheels = [ { url = "https://files.pythonhosted.org/packages/d2/fd/6668e5aec43ab844de6fc74927e155a3b37bf40d7c3790e49fc0406b6578/httpx_sse-0.4.3-py3-none-any.whl", hash = "sha256:0ac1c9fe3c0afad2e0ebb25a934a59f4c7823b60792691f779fad2c5568830fc", size = 8960, upload-time = "2025-10-10T21:48:21.158Z" }, ] +[[package]] +name = "httpx2" +version = "2.12.0" +source = { registry = "https://pypi.org/simple" } +dependencies = [ + { name = "anyio", marker = "sys_platform != 'emscripten'" }, + { name = "httpcore2", marker = "sys_platform != 'emscripten'" }, + { name = "httpx2-jsfetch", marker = "python_full_version >= '3.12' and sys_platform == 'emscripten'" }, + { name = "idna" }, + { name = "truststore", marker = "sys_platform != 'emscripten'" }, + { name = "typing-extensions", marker = "python_full_version < '3.13'" }, +] +sdist = { url = "https://files.pythonhosted.org/packages/7f/f8/579a8b51e42e38ee32647df9f08aa25643ae788e275cc625b199829c4671/httpx2-2.12.0.tar.gz", hash = "sha256:7631fe9887a8a2275f4a2540e053aa670fcc50742864a9ae7c66e609fdcf12cf", size = 100040, upload-time = "2026-08-18T13:22:09.086Z" } +wheels = [ + { url = "https://files.pythonhosted.org/packages/c8/95/411ba65569158e862368917aaf56597f3e5fa3b91b0502919638465a08f3/httpx2-2.12.0-py3-none-any.whl", hash = "sha256:cc8b6eecb8661c146b8f89a60e97456ee086e91a784ed31ac450c3a9e613dd36", size = 95427, upload-time = "2026-08-18T13:22:06.834Z" }, +] + +[[package]] +name = "httpx2-jsfetch" +version = "1.0" +source = { registry = "https://pypi.org/simple" } +sdist = { url = "https://files.pythonhosted.org/packages/cd/c4/0e5636363151a2a1795e0a77617168b9ca438e1748ec05fc9b5687f93d64/httpx2_jsfetch-1.0.tar.gz", hash = "sha256:70a0e3eabfef7cce5ad9c629f7d01ca05e418f586646f4ddf14782e4c1454c60", size = 6872, upload-time = "2026-08-07T00:13:07.492Z" } +wheels = [ + { url = "https://files.pythonhosted.org/packages/9b/43/832f631d32e4f1211caa2ba368317739fe71f0b8530e4c9d15dc454bac2a/httpx2_jsfetch-1.0-py3-none-any.whl", hash = "sha256:cb916b707601e69a07721aabc8f3f6659be3a6893bc1ff5c6f9e02241df2da32", size = 6382, upload-time = "2026-08-07T00:13:06.567Z" }, +] + [[package]] name = "huggingface-hub" version = "0.36.0" @@ -2345,7 +2388,7 @@ typing = [ [package.metadata] requires-dist = [ - { name = "fastmcp-slim", extras = ["client"], marker = "extra == 'mcp'", specifier = ">=3.0.0,<5.0.0" }, + { name = "fastmcp-slim", extras = ["client"], marker = "extra == 'mcp'", specifier = ">=4.0.0b4,<5.0.0" }, { name = "langchain-anthropic", marker = "extra == 'anthropic'", editable = "../partners/anthropic" }, { name = "langchain-aws", marker = "extra == 'aws'" }, { name = "langchain-azure-ai", marker = "extra == 'azure-ai'" }, @@ -2374,7 +2417,7 @@ provides-extras = ["community", "anthropic", "openai", "azure-ai", "google-verte lint = [{ name = "ruff", specifier = ">=0.15.0,<0.17.0" }] test = [ { name = "blockbuster", specifier = ">=1.5.26,<1.6.0" }, - { name = "fastmcp", specifier = ">=3.0.0,<5.0.0" }, + { name = "fastmcp", specifier = ">=4.0.0b4,<5.0.0" }, { name = "langchain-openai", editable = "../partners/openai" }, { name = "langchain-tests", editable = "../standard-tests" }, { name = "pytest", specifier = ">=9.0.3,<10.0.0" }, @@ -2396,7 +2439,7 @@ test-integration = [ { name = "wrapt", specifier = ">=1.15.0,<3.0.0" }, ] typing = [ - { name = "fastmcp", specifier = ">=3.0.0,<5.0.0" }, + { name = "fastmcp", specifier = ">=4.0.0b4,<5.0.0" }, { name = "mypy", specifier = ">=2.1.0,<2.2.0" }, { name = "types-toml", specifier = ">=0.10.8.20240310,<1.0.0.0" }, ] @@ -3193,15 +3236,15 @@ wheels = [ [[package]] name = "mcp" -version = "1.29.1" +version = "2.1.1" source = { registry = "https://pypi.org/simple" } dependencies = [ { name = "anyio" }, - { name = "httpx" }, - { name = "httpx-sse" }, + { name = "httpx2" }, { name = "jsonschema" }, + { name = "mcp-types" }, + { name = "opentelemetry-api" }, { name = "pydantic" }, - { name = "pydantic-settings" }, { name = "pyjwt", extra = ["crypto"] }, { name = "python-multipart" }, { name = "pywin32", marker = "sys_platform == 'win32'" }, @@ -3211,9 +3254,22 @@ dependencies = [ { name = "typing-inspection" }, { name = "uvicorn", marker = "sys_platform != 'emscripten'" }, ] -sdist = { url = "https://files.pythonhosted.org/packages/b5/48/0bb26fdfe7ac16875f534a101ce2405eae192bdef37e7451f2f4507c13ec/mcp-1.29.1.tar.gz", hash = "sha256:1967ba4c315f7a375146209949f45950d18b0efd2f913d7cf3400bc723ee5f04", size = 646823, upload-time = "2026-08-24T18:30:41.161Z" } +sdist = { url = "https://files.pythonhosted.org/packages/d4/6e/21fb8e5d579dbe21d96ea4d5034200d46d8bdf2261053b5bd041f3c2f612/mcp-2.1.1.tar.gz", hash = "sha256:50b7ba1ebbe117008ea7bdd288234043e69c20b403d6851d19661e6d431a75ef", size = 3984589, upload-time = "2026-08-25T16:14:02.376Z" } wheels = [ - { url = "https://files.pythonhosted.org/packages/0b/04/d6b4fb82eefe9e81807aabca1ac98f460ae0883974b83a997aaa20c52545/mcp-1.29.1-py3-none-any.whl", hash = "sha256:b6310eeb59153300c4ab8b9aec4c52f4819a2d6a8e429eb43d908bed7c783648", size = 224653, upload-time = "2026-08-24T18:30:39.573Z" }, + { url = "https://files.pythonhosted.org/packages/50/af/8644cc5fa26a59afd2df2e98eeb19e72926887fa4b7441aba4ff661140db/mcp-2.1.1-py3-none-any.whl", hash = "sha256:1c6c31c5d6471c58db76af3af8af67f46d11d01f0a59077d0a308cbdb3d3e915", size = 357912, upload-time = "2026-08-25T16:13:59.024Z" }, +] + +[[package]] +name = "mcp-types" +version = "2.1.1" +source = { registry = "https://pypi.org/simple" } +dependencies = [ + { name = "pydantic" }, + { name = "typing-extensions" }, +] +sdist = { url = "https://files.pythonhosted.org/packages/6a/dd/1c4417dc0b722c23a1669032d5f044e41170fe5d4773b488a50fcce98c32/mcp_types-2.1.1.tar.gz", hash = "sha256:77dcbe48fba73cca71a673f2646a5f037a017b7a0a07ac89cec1113028890eda", size = 66674, upload-time = "2026-08-25T16:14:03.861Z" } +wheels = [ + { url = "https://files.pythonhosted.org/packages/71/d0/242e63c510f4a17381f55b1549a3f94f5687a0595984febd2b6f87a687a0/mcp_types-2.1.1-py3-none-any.whl", hash = "sha256:26f9f7f03f2a5730717a5b98e2ab7eb640ac352d05a00cdc725c311864778295", size = 69656, upload-time = "2026-08-25T16:14:00.667Z" }, ] [[package]] @@ -5424,6 +5480,15 @@ wheels = [ { url = "https://files.pythonhosted.org/packages/d0/30/dc54f88dd4a2b5dc8a0279bdd7270e735851848b762aeb1c1184ed1f6b14/tqdm-4.67.1-py3-none-any.whl", hash = "sha256:26445eca388f82e72884e0d580d5464cd801a3ea01e63e5601bdff9ba6a48de2", size = 78540, upload-time = "2024-11-24T20:12:19.698Z" }, ] +[[package]] +name = "truststore" +version = "0.10.4" +source = { registry = "https://pypi.org/simple" } +sdist = { url = "https://files.pythonhosted.org/packages/53/a3/1585216310e344e8102c22482f6060c7a6ea0322b63e026372e6dcefcfd6/truststore-0.10.4.tar.gz", hash = "sha256:9d91bd436463ad5e4ee4aba766628dd6cd7010cf3e2461756b3303710eebc301", size = 26169, upload-time = "2025-08-12T18:49:02.73Z" } +wheels = [ + { url = "https://files.pythonhosted.org/packages/19/97/56608b2249fe206a67cd573bc93cd9896e1efb9e98bce9c163bcdc704b88/truststore-0.10.4-py3-none-any.whl", hash = "sha256:adaeaecf1cbb5f4de3b1959b42d41f6fab57b2b1666adb59e89cb0b53361d981", size = 18660, upload-time = "2025-08-12T18:49:01.46Z" }, +] + [[package]] name = "types-requests" version = "2.31.0.6"