Extcord H API

The H API from Extcord — 5 operation(s) for h.

GitHub OpenAPI

Operations 5

POST /h Store a value as a handle #
GET /h/{handle_id} A handle's summary and next steps #
GET /h/{handle_id}/value Read a handle's value, paged #
GET /h/{handle_id}/raw The raw value with its natural media type #
GET /h/{handle_id}/provenance Where a handle came from #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/extcord-io:extcord-io-h-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

extcord-io-h-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: Extcord H API
  description: 'Agent-first utility gateway. Start at GET / or /.well-known/agent.json. MCP clients: connect to /mcp (streamable HTTP).'
  version: 0.7.0
tags:
- name: H
paths:
  /h:
    post:
      summary: Store a value as a handle
      operationId: create_handle_h_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/HandleBody'
        required: true
      responses:
        '201':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - H
  /h/{handle_id}:
    get:
      summary: A handle's summary and next steps
      operationId: get_handle_h__handle_id__get
      parameters:
      - name: handle_id
        in: path
        required: true
        schema:
          type: string
          title: Handle Id
      - name: inline_max_tokens
        in: query
        required: false
        schema:
          type: integer
          maximum: 20000
          minimum: 0
          default: 300
          title: Inline Max Tokens
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - H
  /h/{handle_id}/value:
    get:
      summary: Read a handle's value, paged
      operationId: handle_value_h__handle_id__value_get
      parameters:
      - name: handle_id
        in: path
        required: true
        schema:
          type: string
          title: Handle Id
      - name: offset
        in: query
        required: false
        schema:
          type: integer
          minimum: 0
          default: 0
          title: Offset
      - name: limit
        in: query
        required: false
        schema:
          anyOf:
          - type: integer
            maximum: 100000
            minimum: 1
          - type: 'null'
          title: Limit
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - H
  /h/{handle_id}/raw:
    get:
      summary: The raw value with its natural media type
      operationId: handle_raw_h__handle_id__raw_get
      parameters:
      - name: handle_id
        in: path
        required: true
        schema:
          type: string
          title: Handle Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - H
  /h/{handle_id}/provenance:
    get:
      summary: Where a handle came from
      operationId: handle_provenance_h__handle_id__provenance_get
      parameters:
      - name: handle_id
        in: path
        required: true
        schema:
          type: string
          title: Handle Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - H
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    HandleBody:
      properties:
        value:
          title: Value
        type:
          anyOf:
          - type: string
          - type: 'null'
          title: Type
      additionalProperties: false
      type: object
      required:
      - value
      title: HandleBody