> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usepatchwork.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Create a thread

> Open a conversation against a published agent. Direct tokens take the subject from `sub`. Relay may pass `subject_ref` in the body.




## OpenAPI

````yaml /openapi.yaml post /v1/loom/threads
openapi: 3.1.0
info:
  title: Patchwork API
  version: 1.0.0
  description: >
    Public data-plane API. Two products today: Identify (bare account
    resolution) and Loom (threads, runs, and outcomes). Every response is a JSON
    envelope — `status: success` with `data`, or `status: error` with `error`.
  contact:
    url: https://usepatchwork.co
servers:
  - url: https://api.usepatchwork.co
security:
  - bearerAuth: []
tags:
  - name: Identify
    description: Resolve an account or wallet to the institution and rails behind it.
  - name: Loom
    description: Threads, messages, runs, and outcomes for an embedded agent.
paths:
  /v1/loom/threads:
    post:
      tags:
        - Loom
      summary: Create a thread
      description: >
        Open a conversation against a published agent. Direct tokens take the
        subject from `sub`. Relay may pass `subject_ref` in the body.
      operationId: createThread
      parameters:
        - $ref: '#/components/parameters/PatchworkSubject'
        - $ref: '#/components/parameters/PatchworkConnection'
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                agent:
                  type: string
                  description: >-
                    Agent public id (`agent_…`). Defaults to the workspace's
                    published agent.
                subject_ref:
                  type: string
                  description: Relay only. Acting user id. Ignored on a direct token.
            examples:
              default:
                summary: Default agent
                value: {}
              named:
                summary: Named agent
                value:
                  agent: agent_8f2a1c4e9b0d7a12
      responses:
        '201':
          description: Thread created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EnvelopeThread'
        '401':
          description: Missing or invalid credentials.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Unknown agent.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  parameters:
    PatchworkSubject:
      name: Patchwork-Subject
      in: header
      required: false
      description: >
        Relay only. Opaque subject id for the acting user. Direct tokens carry
        `sub` instead — do not send this header on a session token.
      schema:
        type: string
    PatchworkConnection:
      name: Patchwork-Connection
      in: header
      required: false
      description: >
        Connection id or name the agent may call. Required in relay when the
        agent has unpinned customer tools. Direct tokens may carry `conn`
        instead.
      schema:
        type: string
  schemas:
    EnvelopeThread:
      type: object
      required:
        - status
        - data
      properties:
        status:
          type: string
          const: success
        data:
          $ref: '#/components/schemas/ThreadCreated'
    Error:
      type: object
      required:
        - status
        - error
      properties:
        status:
          type: string
          const: error
        error:
          type: object
          required:
            - message
            - code
          properties:
            message:
              type: string
              description: Human-readable explanation.
            code:
              type: string
              description: Stable machine-readable code.
            details:
              description: Optional extra context.
    ThreadCreated:
      type: object
      required:
        - id
      properties:
        id:
          type: string
          format: uuid
        agent:
          type: object
          properties:
            name:
              type: string
        subject_ref:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >
        Identify accepts a workspace API key (`sk_…`). Loom accepts either a
        short-lived session token (direct) or a workspace API key (relay).

````