# `crossref__crossref_get_member`
**Get Member by ID**
Resolves a Crossref member ID to its publisher/organization record: primary name, alternate imprint names, owned DOI prefixes, registered DOI counts, a per-work-type breakdown, and per-category metadata deposit coverage. Members are the organizations that register DOIs with Crossref, so this answers "what does this publisher publish, and how completely do they deposit metadata?" Resolve a DOI prefix (e.g. "10.1038") to its member ID with crossref_get_prefix, then pass that ID here.
- Server: [Crossref](https://gateway.mcpharbor.dev/docs/servers/crossref) (`dev.mcpharbor.gateway/crossref`)
- Price per call: $0.0001 (100 micro-USD); only tools/call is charged
- Endpoint: `https://gateway.mcpharbor.dev/mcp` or `https://gateway.mcpharbor.dev/mcp/crossref`
- Upstream tool: exposed by the provider; called through this gateway as `crossref__crossref_get_member`
- Provider terms: (verified 2026-09-19)
- Upstream API documentation:
- Rate limit: 50 requests per minute
## Parameters
- `member_id` (integer, required): Crossref member ID — a positive integer, e.g. 297 (Springer) or 340 (PLOS). Resolve a DOI prefix to a member ID first with crossref_get_prefix.
## Example call
Request headers and body:
```http
POST /mcp HTTP/1.1
Host: gateway.mcpharbor.dev
Authorization: Bearer
Content-Type: application/json
Accept: application/json, text/event-stream
MCP-Protocol-Version: 2026-07-28
Mcp-Method: tools/call
Mcp-Name: crossref__crossref_get_member
```
```json
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"_meta": {
"io.modelcontextprotocol/clientCapabilities": {},
"io.modelcontextprotocol/clientInfo": {
"name": "example-agent",
"version": "1.0.0"
},
"io.modelcontextprotocol/protocolVersion": "2026-07-28"
},
"arguments": {
"member_id": 1
},
"name": "crossref__crossref_get_member"
}
}
```
A successful response:
```json
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"_meta": {
"dev.mcpharbor.gateway/call": {
"chargedMicroUsd": 100,
"id": ""
}
},
"content": [
{
"text": "",
"type": "text"
}
],
"resultType": "complete"
}
}
```
This call costs $0.0001 (100 micro-USD). Reading this page and listing the tool cost nothing.
The `dev.mcpharbor.gateway/call` record in the result is the receipt for that charge. Each
POST is metered separately, so sending the same call again buys another one: see
[agent.txt](https://gateway.mcpharbor.dev/agent.txt), section 7, before retrying.
## Attribution
This provider asks for no attribution. Their terms still apply: see the table above.
## Tool definition
Exactly as `tools/list` returns it (free):
```json
{
"_meta": {
"dev.mcpharbor.gateway/pricing": {
"currency": "USD",
"pricePerCallMicroUsd": 100
}
},
"annotations": {
"idempotentHint": true,
"readOnlyHint": true
},
"description": "Resolves a Crossref member ID to its publisher/organization record: primary name, alternate imprint names, owned DOI prefixes, registered DOI counts, a per-work-type breakdown, and per-category metadata deposit coverage. Members are the organizations that register DOIs with Crossref, so this answers \"what does this publisher publish, and how completely do they deposit metadata?\" Resolve a DOI prefix (e.g. \"10.1038\") to its member ID with crossref_get_prefix, then pass that ID here.",
"inputSchema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"member_id": {
"description": "Crossref member ID — a positive integer, e.g. 297 (Springer) or 340 (PLOS). Resolve a DOI prefix to a member ID first with crossref_get_prefix.",
"exclusiveMinimum": 0,
"maximum": 9007199254740991,
"type": "integer"
}
},
"required": [
"member_id"
],
"type": "object"
},
"name": "crossref__crossref_get_member",
"outputSchema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"anyOf": [
{
"not": {
"required": [
"error"
]
},
"required": [
"id"
]
},
{
"required": [
"error"
]
}
],
"properties": {
"counts": {
"additionalProperties": false,
"description": "Registered DOI counts",
"properties": {
"backfileDois": {
"description": "DOIs registered in the backfile (older) window",
"type": "number"
},
"currentDois": {
"description": "DOIs registered in the current (recent) window",
"type": "number"
},
"totalDois": {
"description": "Total DOIs registered by this member (current + backfile)",
"type": "number"
}
},
"type": "object"
},
"coverage": {
"description": "Per-category metadata deposit coverage — each a 0–1 fraction split into current (recent) and backfile (older) DOIs. Signals how completely this publisher deposits references, abstracts, ORCIDs, funders, licenses, and similar metadata.",
"items": {
"additionalProperties": false,
"description": "Metadata deposit coverage for one category",
"properties": {
"backfile": {
"description": "Coverage fraction (0–1) among backfile (older) DOIs",
"type": "number"
},
"category": {
"description": "Metadata deposit category, e.g. \"references\", \"abstracts\", \"orcids\", \"funders\", \"licenses\", \"affiliations\"",
"type": "string"
},
"current": {
"description": "Coverage fraction (0–1) among current (recent) DOIs",
"type": "number"
}
},
"required": [
"category"
],
"type": "object"
},
"type": "array"
},
"deposits": {
"description": "Whether the member deposits any metadata with Crossref",
"type": "boolean"
},
"depositsArticles": {
"description": "Whether the member deposits journal-article metadata",
"type": "boolean"
},
"error": {
"additionalProperties": {},
"description": "Present when the call failed. Absent on success.",
"properties": {
"code": {
"description": "JSON-RPC error code for this failure.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"data": {
"additionalProperties": {},
"properties": {
"reason": {
"description": "Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `member_not_found`: No Crossref member exists for the given ID. Other values are possible when a failure originates below the handler.",
"examples": [
"rate_limited",
"upstream_unavailable",
"malformed_response",
"request_timeout",
"member_not_found"
],
"type": "string"
},
"recovery": {
"additionalProperties": {},
"description": "Actionable next step for the caller.",
"properties": {
"hint": {
"type": "string"
}
},
"required": [
"hint"
],
"type": "object"
},
"retryable": {
"description": "Whether retrying may succeed.",
"type": "boolean"
}
},
"type": "object"
},
"message": {
"description": "Human-readable description of what went wrong.",
"type": "string"
}
},
"required": [
"code",
"message"
],
"type": "object"
},
"id": {
"description": "Crossref member ID",
"type": "number"
},
"location": {
"description": "Publisher location (city, region, country)",
"type": "string"
},
"names": {
"description": "Alternate and imprint names registered under this member",
"items": {
"type": "string"
},
"type": "array"
},
"prefixes": {
"description": "DOI prefixes owned by this member, e.g. \"10.1038\"",
"items": {
"type": "string"
},
"type": "array"
},
"primaryName": {
"description": "Primary publisher/organization name",
"type": "string"
},
"worksByType": {
"description": "DOI counts broken down by work type (all DOIs), sorted by count descending",
"items": {
"additionalProperties": false,
"description": "DOI count for one work type",
"properties": {
"count": {
"description": "Number of DOIs of this type registered by the member",
"type": "number"
},
"type": {
"description": "Crossref work type, e.g. \"journal-article\", \"book-chapter\", \"posted-content\"",
"type": "string"
}
},
"required": [
"type",
"count"
],
"type": "object"
},
"type": "array"
}
},
"type": "object"
},
"title": "Get Member by ID"
}
```