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3a9717e6beCo-authored-by: Claude Opus 4.6 <noreply@anthropic.com> Co-authored-by: Jeremiah Lowin <jlowin@users.noreply.github.com> Co-authored-by: Marvin Context Protocol <41898282+Marvin Context Protocol@users.noreply.github.com> Co-authored-by: voidborne-d <voidborne-d@users.noreply.github.com> Co-authored-by: marvin-context-protocol[bot] <225465937+marvin-context-protocol[bot]@users.noreply.github.com> Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: d 🔹 <258577966+voidborne-d@users.noreply.github.com> Co-authored-by: Jeremiah Lowin <153965+jlowin@users.noreply.github.com> Co-authored-by: nightcityblade <nightcityblade@gmail.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com> Co-authored-by: Bill Easton <strawgate@users.noreply.github.com> Co-authored-by: Sumanshu Nankana <sumanshunankana@gmail.com> Co-authored-by: Eric Robinson <ericrobinson@indeed.com> Co-authored-by: Martim Santos <martimfasantos@gmail.com> Co-authored-by: d 🔹 <liusway405@gmail.com> Co-authored-by: Matthieu B <66959271+mtthidoteu@users.noreply.github.com> Co-authored-by: Sascha Buehrle <47737812+saschabuehrle@users.noreply.github.com> Co-authored-by: Hakancan <142545736+hkc5@users.noreply.github.com> Co-authored-by: nightcityblade <jackchen@haloailabs.com> Co-authored-by: Matt Hallowell <17804673+mhallo@users.noreply.github.com> Co-authored-by: nate nowack <thrast36@gmail.com> Co-authored-by: Bill Easton <williamseaston@gmail.com> Co-authored-by: Marcus Shu <46469249+shulkx@users.noreply.github.com> Co-authored-by: Rushabh Doshi <radoshi@gmail.com> Co-authored-by: AIKAWA Shigechika <shige@aikawa.jp> Co-authored-by: Jeremy Simon <simonjer805@gmail.com> Co-authored-by: Miguel Miranda Dias <7780875+pandego@users.noreply.github.com> Co-authored-by: Anthony James Padavano <padavano.anthony@gmail.com> Co-authored-by: Mostafa Kamal <hiremostafa@gmail.com> Fix auto-close MRE script posting comment without closing (#3386) Fix WorkOS token scope verification bypass 🤖 Generated with Codex (#3407) Fix initialize McpError fallthrough 🤖 Generated with Codex (#3413) Fix transform arg collisions with passthrough params (#3431) Fix get_* returning None when latest version is disabled (#3439) Fix get_* returning None when latest version is disabled (#3421) Fix server lifespan overlap teardown (#3415) Fix $ref output schema object detection regression (#3420) resolved annotations (#3429) Fix async partial callables rejected by iscoroutinefunction (#3438) Fix async partial callables rejected by iscoroutinefunction (#3423) fix: add version to components (#3458) fix: use intent-based flag for OIDC scope patch in load_access_token (#3465) Fixes #3461 fix: normalize Google scope shorthands and surface valid_scopes (#3477) fix: resolve ty 0.0.23 type-checking errors and bump pin (#3481) fix: shield lifespan teardown from cancellation (#3480) fix: forward custom_route endpoints from mounted servers (#3462) fix updates _get_additional_http_routes() to traverse providers, Fixes #3457 fix: remove hardcoded version from CLI help text (#3456) fix: monty 0.0.8 compatibility, drop external_functions from constructor (#3468) fix: task test teardown hanging 5s per test (#3499) Closes #3498 fix: validate workspace path is a directory before cursor install (#3440) Fixes #3426 fix: handle re.error from malformed URI templates in build_regex (#3501) fix: reject empty/OIDC-only required_scopes in AzureProvider (#3503) fix: restrict $ref resolution to local refs only (SSRF/LFI) (#3502) fix warnings and timeouts (#3504) close upgrade check issue when build passes (#3505) Closes #3484 fix: URL-encode path params to prevent SSRF/path traversal (GHSA-vv7q-7jx5-f767) (#3507) fix: prevent path traversal in skill download (#3493) fix: prefer IdP-granted scopes over client-requested scopes in OAuthProxy (#3492) fix: remove unrelated transform and http.py changes from PR scope fix: remove forced follow_redirects from httpx_client_factory calls (#3496) fix: stop passing follow_redirects to httpx_client_factory fix: restore follow_redirects=True for custom httpx client factories Closes #3509 fix: CSRF double-submit cookie check in consent flow (#3519) fix: validate server names in install commands (#3522) fix: use raw strings for regex in pytest.raises match (#3523) fix: reject refresh tokens used as Bearer access tokens (#3524) fix: route ResourcesAsTools/PromptsAsTools through server middleware (#3495) fix: resolve Pyright "Module is not callable" on @tool, @resource, @prompt decorators (#3540) fix: filter warnings by message in KEY_PREFIX test (#3549) fix: suppress output schema for ToolResult subclass annotations (#3548) fix: increase sleep duration in proxy cache tests (#3567) fix: store absolute token expiry to prevent stale expires_in on reload (#3572) fix: preserve tool properties named 'title' during schema compression (#3582) Fix loopback redirect URI port matching per RFC 8252 §7.3 (#3589) Fix app tool routing: visibility check and middleware propagation (#3591) Fix query parameter serialization to respect OpenAPI explode/style settings (#3595) Fix dev apps form: union types, textarea support, JSON parsing (#3597) fix(google): replace deprecated /oauth2/v1/tokeninfo with /oauth2/v3/userinfo (#3603) fix: resolve EntraOBOToken dependency injection through MultiAuth (#3609) fix(docs): correct misleading stateless_http header (#3622) fix: filesystem provider import machinery (#3626) Closes #3625 (issues 2, 3, 6) fix: recover StdioTransport after subprocess exits (#3630) fix(server): preserve mounted tool task metadata (#3632) fix: scope deprecation warning filter to FastMCPDeprecationWarning (#3649) fix imports, add PrefabAppConfig (#3650) fix: resolve CurrentFastMCP/ctx.fastmcp to child server in mounted background tasks (#3651) Fix blocking docs issues: chart imports, Select API, Rx consistency (#3652) closed by default (#3657) Fix prompt caching middleware missing wrap/unwrap round-trip (#3666) fix: serialize object query params per OpenAPI style/explode rules (#3662) Fixes #2857 fix: HTTP request headers not accessible in background task workers (#3631) fix: restore HTTP headers in worker execution path for background tasks (#3681) fix: strip discriminator after dereferencing schemas (#3682) fix: remove stale ty:ignore directives for ty 0.0.26 (#3684) Fix docs gaps in app provider pages (#3690) fix: dev apps log panel UX improvements (#3698) fix dev server empty string args (#3700)
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2.1 KiB
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66 lines
2.1 KiB
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---
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title: resources_as_tools
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sidebarTitle: resources_as_tools
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---
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# `fastmcp.server.transforms.resources_as_tools`
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Transform that exposes resources as tools.
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This transform generates tools for listing and reading resources, enabling
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clients that only support tools to access resource functionality.
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The generated tools route through `ctx.fastmcp` at runtime, so all server
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middleware (auth, visibility, rate limiting, etc.) applies to resource
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operations exactly as it would for direct `resources/read` calls.
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Example:
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```python
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from fastmcp import FastMCP
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from fastmcp.server.transforms import ResourcesAsTools
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mcp = FastMCP("Server")
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mcp.add_transform(ResourcesAsTools(mcp))
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# Now has list_resources and read_resource tools
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```
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## Classes
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### `ResourcesAsTools` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/transforms/resources_as_tools.py#L41" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
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Transform that adds tools for listing and reading resources.
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Generates two tools:
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- `list_resources`: Lists all resources and templates
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- `read_resource`: Reads a resource by URI
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The generated tools route through the server at runtime, so auth,
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middleware, and visibility apply automatically.
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This transform should be applied to a FastMCP server instance, not
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a raw Provider, because the generated tools need the server's
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middleware chain for auth and visibility filtering.
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**Methods:**
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#### `list_tools` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/transforms/resources_as_tools.py#L78" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
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```python
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list_tools(self, tools: Sequence[Tool]) -> Sequence[Tool]
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```
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Add resource tools to the tool list.
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#### `get_tool` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/transforms/resources_as_tools.py#L86" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
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```python
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get_tool(self, name: str, call_next: GetToolNext) -> Tool | None
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```
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Get a tool by name, including generated resource tools.
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