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OpenAPI Specification

openapi: 3.2.0
info:
  title: AT Protocol Core API (com.atproto) Identity API
  description: The core AT Protocol XRPC API covering server identity, repository management, account administration, moderation/labeling, and data synchronization. Endpoints are accessed via HTTP GET (queries) and POST (procedures) at /xrpc/{NSID} on any PDS host or the Bluesky-hosted services at bsky.social and bsky.network. Schemas are defined using Lexicon, AT Protocol's schema definition language.
  version: 1.0.0
  contact:
    name: AT Protocol
    url: https://atproto.com/
  license:
    name: MIT / Apache-2.0
    url: https://github.com/bluesky-social/atproto/blob/main/LICENSE.txt
servers:
- url: https://bsky.social/xrpc
  description: Bluesky PDS (Personal Data Server)
- url: https://bsky.network/xrpc
  description: Bluesky Relay / BGS
- url: https://{pds_host}/xrpc
  description: Self-hosted PDS
  variables:
    pds_host:
      default: bsky.social
      description: Hostname of the Personal Data Server
security:
- bearerAuth: []
- {}
tags:
- name: identity
  description: DID and handle resolution, identity management
paths:
  /com.atproto.identity.resolveHandle:
    get:
      operationId: com_atproto_identity_resolveHandle
      summary: Resolve Handle
      description: Resolves a handle (eg, username) to a DID.
      tags:
      - identity
      security:
      - {}
      parameters:
      - name: handle
        in: query
        required: true
        description: The handle to resolve. If not supplied, will resolve the host's own handle.
        schema:
          type: string
      responses:
        '200':
          description: Resolved DID
          content:
            application/json:
              schema:
                type: object
                required:
                - did
                properties:
                  did:
                    type: string
                    description: The DID of the resolved handle
        '400':
          $ref: '#/components/responses/BadRequest'
  /com.atproto.identity.updateHandle:
    post:
      operationId: com_atproto_identity_updateHandle
      summary: Update Handle
      description: Updates the current account's handle.
      tags:
      - identity
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - handle
              properties:
                handle:
                  type: string
                  description: The new handle.
      responses:
        '200':
          description: Handle updated
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /com.atproto.identity.resolveDid:
    get:
      operationId: com_atproto_identity_resolveDid
      summary: Resolve DID
      description: Resolves a DID to a DID document.
      tags:
      - identity
      security:
      - {}
      parameters:
      - name: did
        in: query
        required: true
        description: The DID to resolve.
        schema:
          type: string
      responses:
        '200':
          description: DID document
          content:
            application/json:
              schema:
                type: object
                description: DID document (W3C DID Core format)
        '400':
          $ref: '#/components/responses/BadRequest'
components:
  responses:
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: Bad request or validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      required:
      - error
      - message
      properties:
        error:
          type: string
          description: Error name/code
        message:
          type: string
          description: Human-readable error message
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Access JWT obtained from createSession or refreshSession
    refreshAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Refresh JWT obtained from createSession
externalDocs:
  description: AT Protocol XRPC Specification
  url: https://atproto.com/specs/xrpc