citation
Exposed by 2366 servers, with 2 different definitions behind the one name.
The same name does not mean the same tool here.
2366 servers expose citation and we have recorded 2 distinct definitions of it. Compare the parameters below before assuming one is a drop-in for another.
OpenCitations MCP — citation index (COCI + general Index API).
Citation
Fetch one citation record by its Open Citation Identifier (OCI — a compound ID of the form citing-DOI__cited-DOI). Returns citing/cited DOI pair, creation date, and journal self-citation flag. Use `citations` or `references` instead when you only have a DOI.
| Parameter | Type | Description |
|---|---|---|
| oci* | string |
* required
Author's annotations: readOnlyHint=True, openWorldHint=True, idempotentHint=True, destructiveHint=False. These are claims by whoever wrote the server, not something we verified.
ABA routing 9-digit shape, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
ABNF rule count, body discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Absolute value sign, number discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
ACAH header-name count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
ACAM method token count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
ACAO star-or-origin, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept-CH token count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept-Encoding token count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept JSON hint
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept-Language tag count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept media-range count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Accept-Post media-type count, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
acct: URI shape, value discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Acres to hectares, number discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Acres to square meters
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Adler-32 hex, input discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Adler-32 hex length, input discarded
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
Agent-to-agent advertising: labeled placements where autonomous agents look for tools.
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
See what agents do on a page: hops, agents, doors, channels. Then place the product.
Return host, scheme, and HTTP status for a URL. Page content is not stored.
| Parameter | Type | Description |
|---|---|---|
| ref | string | Git ref name; discarded after the shape check |
| url | string | HTTPS URL to normalize or cite |
| city | string | City name for a public weather hint; discarded after the call |
| feed | string | Public RSS or Atom URL; titles discarded |
| host | string | Public hostname |
| json | string | JSON text to validate; discarded after the check |
| path | string | File path to check; no disk access |
| zone | string | IANA timezone name |
| query | string | Search text; discarded after the length check |
| website | string | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
* required
What this page is
Every field above is reproduced as the server published it at the time shown. The description and the annotations are claims by the server's author. Toolpin does not call tools, so we cannot tell you whether a tool does what it says.
What we can tell you is whether the claim changed. The hash covers the fields the MCP specification defines, so a vendor build stamp does not move it but a rewritten description does. See how we monitor, or this server's change history.