Official MCP Registry API
The Official MCP Registry is the community registry service for Model Context Protocol servers, run by the MCP project. Its REST API publishes a full OpenAPI 3.1.0 contract with 32 operations across two live version prefixes (/v0.1 and /v0). Reads are anonymous — list, search and fetch server records with cursor pagination and an updated_since incremental-sync filter; writes require a Registry JWT minted by proving namespace ownership through GitHub OAuth, GitHub or generic OIDC, a DNS signature, or an HTTP signature. Errors are RFC 9457 problem details.
Official MCP Registry API is one of 6 APIs that Agentic AI Foundation publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include MCP, Registry, Server Discovery, Open Standard, and REST API. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, API documentation, a GitHub repository, and authentication docs.
This API exposes 32 operations across 30 paths, organized into 7 resource areas, and defines 28 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.
Requests are made against the base URL https://registry.modelcontextprotocol.io.
Metadata
The identity and technical contract details declared by the specification.
Paths & Operations 32
Across 30 paths, the API surfaces 32 operations — 12 GET, 4 PATCH, 14 POST, 2 PUT. They span 7 resource areas: auth, health, ping, publish, servers, validate, version. Each is listed below with its method, path, parameters, and response codes.
Authentication operations for obtaining tokens to publish servers
Health check endpoint for monitoring service availability
Simple ping endpoint for testing connectivity
Operations for publishing MCP servers to the registry
Operations for discovering and retrieving MCP servers
Version information endpoint for retrieving build and version details
Schemas 28
The contract defines 28 schemas that model the data the API accepts and returns. The most detailed are Argument (13 properties), ServerJSON (11 properties), KeyValueInput (10 properties), Package (10 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Agentic AI Foundation 5
Other APIs Agentic AI Foundation publishes across the network.
This is an independent, third-party profile of Official MCP Registry API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
·
Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and
you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.