# io.github.cyanheads/met-museum-mcp-server

> Search the Met collection, browse by department or update date, fetch full records and CC0 images.

- name: io.github.cyanheads/met-museum-mcp-server
- version: 0.9.0
- connection class: R0 (autonomous)
- trust: 94/100
- quality: 73/100 (needs work)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Fmet-museum-mcp-server
- tools: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Fmet-museum-mcp-server/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "met-museum-mcp-server": {
      "type": "http",
      "url": "https://met-museum.caseyjhand.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 100
- provenance: 80
- drivers: +repository +namespace-matches-repo +reachable +uptime-100% +updated-5d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 73/100 (needs work)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: met_list_objects (destructiveHint, openWorldHint); met_get_object (destructiveHint, openWorldHint); met_list_departments (destructiveHint, openWorldHint); …
- pass `tools.token_cost`: about 2,632 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 25 (weight 15)

- warn `stability.changes`: 13 tool changes in 30 days
- fail `stability.rug_pull`: 1 tools kept their name but changed most of their description in 30 days; review before trusting them

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: deps.dev does not know @cyanheads/met-museum-mcp-server@0.9.0, @cyanheads/met-museum-mcp-server@0.9.0

- tools: 4, about 2,632 tokens to load them all
- tool set hash: 43b3d8d16a11eb96e0313e2fa90c8556
- tools last changed: 2026-10-15T13:47:59.272Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.cyanheads/met-museum-mcp-server.svg)](https://protogrid.dev/servers/io.github.cyanheads/met-museum-mcp-server)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-15 `met_get_object` changed (description, inputSchema, outputSchema)
  - before: Fetch full records for one or more Met Museum object IDs. Accepts up to 20 IDs per call and returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call. Set includeImages to also receive the CC0 images of up to 3 returned records as image content a vision-capable model can look at.
  - after: Fetch full records for one or more Met Museum object IDs. Fetches up to 20 distinct IDs per call; a list of up to 500 (a full search or list page) is accepted, and the distinct IDs past the first 20 come back unrequested in remainingIDs for a follow-up call. Returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call. Set includeImages to also receive the CC0 images of up to 3 returned records as image content a vision-capable model can look at.
- 2026-10-15 `met_list_objects` changed (inputSchema, outputSchema)
- 2026-10-15 `met_search_collections` changed (inputSchema, outputSchema)
- 2026-10-15 `met_list_departments` changed (outputSchema)
- 2026-10-04 `met_get_object` changed (description, inputSchema, outputSchema)
  - before: Fetch full records for one or more Met Museum object IDs. Accepts up to 20 IDs per call and returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call.
  - after: Fetch full records for one or more Met Museum object IDs. Accepts up to 20 IDs per call and returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call. Set includeImages to also receive the CC0 images of up to 3 returned records as image content a vision-capable model can look at.
- 2026-10-04 `met_list_objects` changed (inputSchema, outputSchema)
- 2026-10-04 `met_search_collections` changed (inputSchema, outputSchema)
- 2026-10-04 `met_list_departments` changed (outputSchema)
- 2026-09-30 `met_get_object` changed (description, inputSchema, outputSchema)
  - before: Fetch full records for one or more Met Museum object IDs. Accepts up to 20 IDs per call and returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections. Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call.
  - after: Fetch full records for one or more Met Museum object IDs. Accepts up to 20 IDs per call and returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call.
- 2026-09-30 `met_list_objects` added
  - Browse the Metropolitan Museum of Art collection without a keyword: every object ID in one curatorial department, every object whose record was created or revised on or after a date, or both together. Returns the total count and one page of IDs in ascending order, which met_get_object resolves to full records. With no filter the list is the whole collection (over 500,000 IDs). departmentId takes an ID from met_list_departments; updatedSince takes a YYYY-MM-DD date and answers "what has the Met added or revised since this day". Paging has no depth limit — pass nextOffset to continue. For keyword, classification, place, or object-date filters use met_search_collections instead. A list is cached for up to an hour, so a record revised within the last hour may not appear yet.

Full history: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Fmet-museum-mcp-server/changes

## Dependencies

- npm @cyanheads/met-museum-mcp-server@0.9.0: unknown
- npm @cyanheads/met-museum-mcp-server@0.9.0: unknown

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

- https://met-museum.caseyjhand.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

- npm @cyanheads/met-museum-mcp-server@0.9.0
- npm @cyanheads/met-museum-mcp-server@0.9.0

## Tools (4)

- `met_get_object`: Fetch full records for one or more Met Museum object IDs. Fetches up to 20 distinct IDs per call; a list of up to 500 (a full search or list page) is accepted, and the distinct IDs past the first 20 come back unrequested in remainingIDs for a follow-up call. Returns partial success — a single 404 does not fail the whole batch; per-ID failures are reported separately. Object IDs come from met_search_collections (keyword search) or met_list_objects (browse by department or update date). Non-public-domain objects return empty image URLs. The constituents array is null for anonymous or unattributed works; tags and measurements are null when the Met records none. Records are returned whole and never truncated, so a batch of unusually large records may return fewer than requested — any that did not fit are listed in deferred[] with their sizes, to be re-requested in a follow-up call. Set includeImages to also receive the CC0 images of up to 3 returned records as image content a vision-capable model can look at.
- `met_list_departments`: Return the 19 curatorial departments at The Metropolitan Museum of Art, each with its numeric departmentId and display name — the valid values for the departmentId filter on met_search_collections and met_list_objects.
- `met_list_objects`: Browse the Metropolitan Museum of Art collection without a keyword: every object ID in one curatorial department, every object whose record was created or revised on or after a date, or both together. Returns the total count and one page of IDs in ascending order, which met_get_object resolves to full records. With no filter the list is the whole collection (over 500,000 IDs). departmentId takes an ID from met_list_departments; updatedSince takes a YYYY-MM-DD date and answers "what has the Met added or revised since this day". Paging has no depth limit — pass nextOffset to continue. For keyword, classification, place, or object-date filters use met_search_collections instead. A list is cached for up to an hour, so a record revised within the last hour may not appear yet.
- `met_search_collections`: Search the Metropolitan Museum of Art collection by keyword and optional filters. Returns the total match count and one page of matching object IDs, which met_get_object resolves to full records. Relevance is keyword-based, not semantic; department and geographic filters narrow results more than a longer query. Paging reaches only the first 10,000 matches of any search, so narrow a larger one with filters. The medium parameter takes an object classification as the Met spells it ("Paintings", "Sculpture"), not a material like "Oil on canvas". hasImages also includes copyrighted works; CC0 status is per object, from the isPublicDomain and hasCC0Image fields on met_get_object. isHighlight accepts true only. isOnView restricts results to works currently on display in a Met gallery.