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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "type": "http",
      "url": "https://iana-registries.caseyjhand.com/mcp"
    }
  }
}

claude mcp add --transport http iana-registries-mcp-server https://iana-registries.caseyjhand.com/mcp

[mcp_servers.iana-registries-mcp-server]
url = "https://iana-registries.caseyjhand.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "iana-registries-mcp-server": {
      "type": "remote",
      "url": "https://iana-registries.caseyjhand.com/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "type": "http",
      "url": "https://iana-registries.caseyjhand.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=iana-registries-mcp-server&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vaWFuYS1yZWdpc3RyaWVzLmNhc2V5amhhbmQuY29tL21jcCJ9"
}

{
  "servers": {
    "iana-registries-mcp-server": {
      "type": "http",
      "url": "https://iana-registries.caseyjhand.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "iana-registries-mcp-server": {
      "httpUrl": "https://iana-registries.caseyjhand.com/mcp"
    }
  }
}

extensions:
  "iana-registries-mcp-server":
    enabled: true
    name: "iana-registries-mcp-server"
    type: streamable_http
    uri: "https://iana-registries.caseyjhand.com/mcp"
    timeout: 300

Quality 84 / 100good

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene79 · weight 30

pass
tools.descriptionsevery tool has a description
warn
tools.description_length1 tools have descriptions over 1,024 characters, which crowds the context
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations10 of 10 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: iana_lookup_http_status (destructiveHint); iana_lookup_http_field (destructiveHint); iana_lookup_uri_scheme (destructiveHint); …
pass
tools.token_costabout 4,948 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability75 · weight 15

warn
stability.changes10 tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependencies100 · weight 15

pass
deps.known_vulnsno known advisory in 90 resolved packages
pass
deps.mcp_sdk_version@modelcontextprotocol/core 2.3.1, no known advisory
pass
deps.resolvable@cyanheads/[email protected], @cyanheads/[email protected] resolved: 90 packages

10 tools, about 4,948 tokens to load them all · tool set 9af57e639a60 · tools last changed 2026-10-18 · checked 2026-10-19 10:52 UTC

Tool changes

2026-10-18iana_get_registry_recordschangedinput schema, output schema
2026-10-18iana_search_registrieschangedinput schema, output schema
2026-10-18iana_get_rfc_statuschangeddescription, input schema, output schema
before
Get the current status of up to 10 RFCs, Internet-Drafts, or BCP/STD/FYI series in one call. Accepts "RFC 9110", "rfc9110", "9110", draft names with or without a revision suffix ("draft-ietf-httpbis-semantics-19"), series numbers ("BCP 14"), RFC and draft file names ("rfc9110.txt"), the URL of an RFC or draft on datatracker.ietf.org, tools.ietf.org, or ietf.org or of an RFC on rfc-editor.org, and a series URL at rfc-editor.org/info/ or datatracker.ietf.org/doc/ ("https://datatracker.ietf.org/doc/bcp14/"). RFCs return current and as-published status, stream, working group, obsoletes/obsoleted-by and updates/updated-by relations, the series they belong to, and the errata page; drafts return their state, IESG state, intended status, expiry, the document that replaced them, and the RFC they became; a series returns its member RFCs. Unknown ids return found: false. A call makes at most 20 Datatracker requests, retries included (an RFC or a series needs one, plus one per call for the RFCs' series; a draft three, or four with a revision suffix): each id is taken in request order if its requests still fit, and the others come back in failed with reason request_limit, to pass in another call.
after · 80% of words in common
Get the current status of up to ten distinct RFCs, Internet-Drafts, or BCP/STD/FYI series per page from up to 1,000 input items. Canonical aliases resolve once. When more remain, deferred_ids previews the next ten, deferred_count counts the whole remainder, and next_ids_offset continues the same original ids. Retry failed ids separately. Accepts "RFC 9110", "rfc9110", "9110", draft names with or without a revision suffix ("draft-ietf-httpbis-semantics-19"), series numbers ("BCP 14"), RFC and draft file names ("rfc9110.txt"), the URL of an RFC or draft on datatracker.ietf.org, tools.ietf.org, or ietf.org or of an RFC on rfc-editor.org, and a series URL at rfc-editor.org/info/ or datatracker.ietf.org/doc/ ("https://datatracker.ietf.org/doc/bcp14/"). RFCs return current and as-published status, stream, working group, obsoletes/obsoleted-by and updates/updated-by relations, the series they belong to, and the errata page; drafts return their state, IESG state, intended status, expiry, the document that replaced them, and the RFC they became; a series returns its member RFCs. Unknown ids return found: false. A call makes at most 20 Datatracker requests, retries included (an RFC or a series needs one, plus one per call for the RFCs' series; a draft three, or four with a revision suffix): each id is taken in request order if its requests still fit, and the others come back in failed with reason request_limit, to pass in another call.
2026-10-18iana_lookup_language_tagchangeddescription, input schema, output schema
before
Parse and validate a BCP 47 language tag against the IANA Language Subtag Registry, or search subtags by description. Pass exactly one of `tag` (e.g. "zh-Hant-TW", "sr-Latn", "en_US") or `description` (e.g. "Swiss German"). A tag is split into language, extlang, script, region, variant, extension, and private-use parts; each part is checked, deprecated subtags report their preferred value, and a canonical tag is returned when the tag is valid. A single subtag registered under several types (e.g. "TW") lists the other types.
after · 79% of words in common
Parse and validate a BCP 47 language tag against the IANA Language Subtag Registry, or search subtags by description. Pass exactly one of `tag` (e.g. "zh-Hant-TW", "sr-Latn", "en_US") or `description` (e.g. "Swiss German"). A tag is split into language, extlang, script, region, variant, extension, and private-use parts; deprecated subtags report their preferred value, and a canonical tag is returned when valid. Extension singleton allocation and defining RFCs are optional metadata; allocation never validates extension content or changes base validity. A single subtag registered under several types (e.g. "TW") lists the other types.
2026-10-18iana_lookup_penchangedinput schema, output schema
2026-10-18iana_lookup_uri_schemechangedinput schema, output schema
2026-10-18iana_lookup_http_fieldchangedinput schema, output schema
2026-10-18iana_lookup_http_statuschangedinput schema, output schema
2026-10-18iana_lookup_media_typechangedinput schema, output schema
2026-10-18iana_lookup_portchangedinput schema, output schema

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 94 / 100

provenance80

liveness99

freshness100

hygiene100

+repository +namespace-matches-repo +reachable +uptime-99% +updated-1d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@cyanheads/[email protected] npm44 dependencies, resolved · MCP SDK @modelcontextprotocol/core 2.3.1 · advisories checked 2026-10-19

No known advisory affects this dependency graph.

@cyanheads/[email protected] npm44 dependencies, resolved · MCP SDK @modelcontextprotocol/core 2.3.1 · advisories checked 2026-10-19

No known advisory affects this dependency graph.

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://iana-registries.caseyjhand.com/mcp` streamable-http	none	yes	99%	212 ms	2026-07-28	2026-10-19

package	registry	version	runtime	secrets
`@cyanheads/iana-registries-mcp-server`	npm	0.2.1	npx
`@cyanheads/iana-registries-mcp-server`	npm	0.2.1	npx

Tools (10)

`iana_get_registry_records`read-only	Read records from any IANA XML registry by id, e.g. registry "tls-parameters" with subregistry "tls-parameters-4" (TLS Cipher Suites), "protocol-numbers", "http-methods", or "cbor-tags"; an iana.org/assignments URL also works. Filter with `value` (exact match on the key column, or on the column `field` names; digits compare by number with a cell of digits ("0443" finds "443") and one 0x token with a one-token 0x cell ("0x5" finds "0x05"), each also matching its own kind of range row ("105-199", "0x11-0xff"); other 0x forms compare their digits as written, in any comma, space, or brace spelling) and `contains` (words in any field; records with a field equal to the words come first). When a registry has several sub-registries and none is given, the response lists them instead of records; a table that nests tables lists them too. Field names are the registry's XML element names (e.g. "rec" is the Recommended column). Large registries page through `cursor`. Find ids with iana_search_registries.
`iana_get_rfc_status`read-only	Get the current status of up to ten distinct RFCs, Internet-Drafts, or BCP/STD/FYI series per page from up to 1,000 input items. Canonical aliases resolve once. When more remain, deferred_ids previews the next ten, deferred_count counts the whole remainder, and next_ids_offset continues the same original ids. Retry failed ids separately. Accepts "RFC 9110", "rfc9110", "9110", draft names with or without a revision suffix ("draft-ietf-httpbis-semantics-19"), series numbers ("BCP 14"), RFC and draft file names ("rfc9110.txt"), the URL of an RFC or draft on datatracker.ietf.org, tools.ietf.org, or ietf.org or of an RFC on rfc-editor.org, and a series URL at rfc-editor.org/info/ or datatracker.ietf.org/doc/ ("https://datatracker.ietf.org/doc/bcp14/"). RFCs return current and as-published status, stream, working group, obsoletes/obsoleted-by and updates/updated-by relations, the series they belong to, and the errata page; drafts return their state, IESG state, intended status, expiry, the document that replaced them, and the RFC they became; a series returns its member RFCs. Unknown ids return found: false. A call makes at most 20 Datatracker requests, retries included (an RFC or a series needs one, plus one per call for the RFCs' series; a draft three, or four with a revision suffix): each id is taken in request order if its requests still fit, and the others come back in failed with reason request_limit, to pass in another call.
`iana_lookup_http_field`read-only	Look up a registered HTTP field (header or trailer) name. Pass exactly one of `name` (case-insensitive, e.g. "Cache-Status") or `keyword` (words matched against field names and comments). Returns the registration status — permanent, provisional, deprecated, or obsoleted — the Structured Field type when registered, and the defining reference. Many widely used headers are unregistered; a miss means only that IANA has no entry.
`iana_lookup_http_status`read-only	Look up an HTTP status code in the IANA registry, or search reason phrases. Pass exactly one of `code` (100–599) or `keyword` (e.g. "too many"). Returns the registered phrase, its class, defining reference with section, and whether it is temporary, obsoleted, or unused; an unassigned code returns found: false with the unassigned range it falls in.
`iana_lookup_language_tag`read-only	Parse and validate a BCP 47 language tag against the IANA Language Subtag Registry, or search subtags by description. Pass exactly one of `tag` (e.g. "zh-Hant-TW", "sr-Latn", "en_US") or `description` (e.g. "Swiss German"). A tag is split into language, extlang, script, region, variant, extension, and private-use parts; deprecated subtags report their preferred value, and a canonical tag is returned when valid. Extension singleton allocation and defining RFCs are optional metadata; allocation never validates extension content or changes base validity. A single subtag registered under several types (e.g. "TW") lists the other types.
`iana_lookup_media_type`read-only	Look up registered media (MIME) types. Pass exactly one of `type` (a full name such as "application/json"; parameters after ";" are ignored) or `keyword` (words matched against registered type names and status annotations, e.g. "geo json"; never against file extensions). An exact `type` lookup also reads the registration template and returns its file-extension, intended-usage, and deprecated-alias statements as written, each only when the template has it. Some registered types have no registration template (`template.available: false`); their references are the defining documents. Deprecated and obsoleted types are reported with their replacement when the registry names one. Unregistered "x-" types are not in the registry.
`iana_lookup_pen`read-only	Look up a Private Enterprise Number (PEN). Pass exactly one of `pen` (a number such as 32473, or an OID under 1.3.6.1.4.1 such as 1.3.6.1.4.1.32473.1.2) or `organization` (words matched against organization names). Returns the organization and its OID prefix. Arcs below the enterprise number are assigned by the enterprise, not IANA. Contact details are not returned.
`iana_lookup_port`read-only	Look up IANA service name and transport protocol port assignments. Pass exactly one of `port` (a number, 0–65535), `service` (an exact service name such as "postgresql"), or `keyword` (words matched against service names and descriptions). Results list every transport (tcp, udp, sctp, dccp) separately, report the registry range row containing an unassigned port, and classify the port as System (0–1023), User (1024–49151), or Dynamic/Private (49152–65535). Service names registered without a port (DNS-SD names) appear with no port.
`iana_lookup_uri_scheme`read-only	Look up a registered URI scheme. Pass exactly one of `scheme` (e.g. "mailto"; a trailing ":" or "://" is ignored) or `keyword` (words matched against scheme names and descriptions). Returns the status — permanent, provisional, or historical — description, references, and well-known URI support.
`iana_search_registries`read-only	Find IANA protocol registries and sub-registries by keyword over their titles and protocol categories, e.g. "tls cipher", "dns resource record", "protocol numbers". Returns the registry and sub-registry ids that iana_get_registry_records reads, with registration procedure and defining documents. Covers every registry linked from the IANA protocol registries index.

Schemas: list_tools.

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Official server.json

{
  "name": "io.github.cyanheads/iana-registries-mcp-server",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://iana-registries.caseyjhand.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.2.1",
  "packages": [
    {
      "version": "0.2.1",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@cyanheads/iana-registries-mcp-server",
      "runtimeHint": "npx",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "MCP_LOG_LEVEL",
          "format": "string",
          "default": "info",
          "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
        }
      ]
    },
    {
      "version": "0.2.1",
      "transport": {
        "url": "http://localhost:3010/mcp",
        "type": "streamable-http"
      },
      "identifier": "@cyanheads/iana-registries-mcp-server",
      "runtimeHint": "npx",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "MCP_TRANSPORT_TYPE",
          "value": "http",
          "format": "string",
          "description": "Selects the HTTP transport."
        },
        {
          "name": "MCP_HTTP_HOST",
          "format": "string",
          "default": "127.0.0.1",
          "description": "The hostname for the HTTP server."
        },
        {
          "name": "MCP_HTTP_PORT",
          "format": "string",
          "default": "3010",
          "description": "The port to run the HTTP server on."
        },
        {
          "name": "MCP_HTTP_ENDPOINT_PATH",
          "format": "string",
          "default": "/mcp",
          "description": "The endpoint path for the MCP server."
        },
        {
          "name": "MCP_AUTH_MODE",
          "format": "string",
          "default": "none",
          "description": "Authentication mode to use: 'none', 'jwt', or 'oauth'."
        },
        {
          "name": "MCP_LOG_LEVEL",
          "format": "string",
          "default": "info",
          "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/cyanheads/iana-registries-mcp-server",
    "source": "github"
  },
  "description": "Find IANA ports, MIME types, HTTP codes/fields, URI schemes, PENs, BCP 47 tags, RFCs, any registry."
}