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

# `POST /api/a2a/upload` — multipart/form-data A2A dispatch entry point.

> Accepts:
- `query`   (text field, required) — the user's question
- Any number of additional fields treated as file attachments

Each file is base64-encoded and forwarded alongside the query to the orchestrator.



## OpenAPI

````yaml /api-reference/openapi.json post /api/orchestrator/a2a/upload
openapi: 3.1.0
info:
  title: Nasiko API
  description: >-
    HTTP API for the Nasiko OpenRuntime: agents, coding harnesses, TokenOps,
    routing, MCP, and secrets. Spec is generated from annotated routes; some
    surfaces are documented on the hand-written pages alongside this file.
  license:
    name: ''
  version: 0.1.0
servers: []
security: []
tags:
  - name: secrets
    description: Encrypted per-user agent secrets
  - name: catalog
    description: >-
      Agent catalog: registration, discovery, versions, per-agent secrets, and
      source import
  - name: agents
    description: >-
      Agent lifecycle: deployments, LLM routing config, update/rollback,
      upload-and-deploy
  - name: orchestrator
    description: >-
      A2A dispatch: routing-engine/ReAct orchestrator and direct agent chat,
      plus routing stats
  - name: users
    description: >-
      User management: CRUD, roles, credentials, accessible agents
      (superuser-only)
  - name: usage
    description: Per-user token usage and cost reporting
  - name: observability
    description: Sessions, traces, spans, agent logs, and FinOps reporting
  - name: llm-router
    description: LLM routing presets, provider/model catalog, and tier→model registry
  - name: mcp
    description: >-
      MCP gateway: agent-facing JSON-RPC tool calls, connector
      registration/upload/sharing, credentials & OAuth, and per-agent tool
      permissions
paths:
  /api/orchestrator/a2a/upload:
    post:
      tags:
        - orchestrator
      summary: '`POST /api/a2a/upload` — multipart/form-data A2A dispatch entry point.'
      description: >-
        Accepts:

        - `query`   (text field, required) — the user's question

        - Any number of additional fields treated as file attachments


        Each file is base64-encoded and forwarded alongside the query to the
        orchestrator.
      operationId: a2a_upload_handler
      requestBody:
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/A2aUploadForm'
        required: true
      responses:
        '200':
          description: A2A event stream (status/artifact updates, completion)
          content:
            text/event-stream: {}
        '400':
          description: Missing/invalid multipart, or an empty query field
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcErrorResponse'
        '500':
          description: Internal error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcErrorResponse'
        '503':
          description: No agents available
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcErrorResponse'
components:
  schemas:
    A2aUploadForm:
      type: object
      description: >-
        Multipart form for `POST /api/orchestrator/a2a/upload` — a required
        `query`

        text field, plus any number of additional fields treated as file
        attachments

        (each base64-encoded and forwarded to the orchestrator alongside the
        query).
      required:
        - query
      properties:
        query:
          type: string
    JsonRpcErrorResponse:
      type: object
      required:
        - jsonrpc
        - error
      properties:
        error:
          $ref: '#/components/schemas/JsonRpcErrorBody'
        id: {}
        jsonrpc:
          type: string
    JsonRpcErrorBody:
      type: object
      description: >-
        Doc-only stand-in for the JSON-RPC error envelope `A2aDispatchError`
        renders.
      required:
        - code
        - message
      properties:
        code:
          type: integer
          format: int32
        message:
          type: string

````