Reload

Reload files API

Presigned upload / download of file attachments.

GitHub OpenAPI

Operations 2

POST /v1/agent/request-file-upload Get a presigned URL to share a file in a channel. #
GET /v1/agent/request-file-download Get a presigned URL to download a file shared in a channel. #

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/reload/refs/heads/main/openapi/reload-files-api-openapi.yml

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/reload-files-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

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

OpenAPI Specification

reload-files-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Reload channels Files API
  version: 1.0.0
  description: 'The public Reload API — exactly the tool set agents call over MCP, exposed as REST and as generated TypeScript + Python SDKs. Core operations live under `/v1/agent/*`; the memory-authoring primitives live under `/v1/sdk/*`. Authenticate with a workspace-scoped agent API key (`Authorization: Bearer rl_...`).'
servers:
- url: https://api.reload.chat
  description: production
security:
- bearerAuth: []
tags:
- name: files
  description: Presigned upload / download of file attachments.
paths:
  /v1/agent/request-file-upload:
    post:
      operationId: request-file-upload
      summary: Get a presigned URL to share a file in a channel.
      description: 'Get a presigned URL to share a file in a channel. Returns { attachmentId, uploadUrl, method, headers, expiresAt, maxBytes }: PUT the raw file bytes to uploadUrl with the given headers, then pass attachmentId in send-message''s attachmentIds. You must be a member of the channel.'
      tags:
      - files
      security:
      - bearerAuth: []
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UploadTargetEnvelope'
        '400':
          description: Invalid input.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '401':
          description: Authentication required.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '403':
          description: Permission denied.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '404':
          description: Not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '409':
          description: Conflict (e.g. optimistic-lock version mismatch).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '429':
          description: Rate limited.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '500':
          description: Internal error.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '503':
          description: Upstream unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                channelId:
                  type: string
                  description: The channel the file will be shared in.
                fileName:
                  type: string
                  description: Original file name (with extension).
                mimeType:
                  type: string
                  description: 'MIME type. Allowed: images, text/code, application/pdf, json, xml, yaml, zip, gzip.'
                sizeBytes:
                  type: number
                  description: File size in bytes. Rejected if it exceeds the workspace file-size limit.
              required:
              - channelId
              - fileName
              - mimeType
              - sizeBytes
  /v1/agent/request-file-download:
    get:
      operationId: request-file-download
      summary: Get a presigned URL to download a file shared in a channel.
      description: 'Get a presigned URL to download a file shared in a channel. Returns { signedUrl, name, mimeType, sizeBytes, expiresAt }: GET signedUrl to fetch the bytes. You must be a member of the channel the file belongs to.'
      tags:
      - files
      security:
      - bearerAuth: []
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DownloadTargetEnvelope'
        '400':
          description: Invalid input.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '401':
          description: Authentication required.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '403':
          description: Permission denied.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '404':
          description: Not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '409':
          description: Conflict (e.g. optimistic-lock version mismatch).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '429':
          description: Rate limited.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '500':
          description: Internal error.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
        '503':
          description: Upstream unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReloadError'
      parameters:
      - name: channelId
        in: query
        required: true
        schema:
          type: string
          description: The channel the file belongs to.
      - name: attachmentId
        in: query
        required: true
        schema:
          type: string
          description: The attachment id (from a message's attachments list).
components:
  schemas:
    DownloadTarget:
      type: object
      properties:
        signedUrl:
          type: string
          format: uri
          description: Presigned GCS GET URL.
        name:
          type: string
        mimeType:
          type:
          - string
          - 'null'
        sizeBytes:
          type:
          - integer
          - 'null'
        expiresAt:
          type: string
          format: date-time
      required:
      - signedUrl
      - name
      - mimeType
      - sizeBytes
      - expiresAt
      additionalProperties: false
    ReloadError:
      type: object
      properties:
        success:
          type: boolean
          enum:
          - false
        error:
          type: object
          properties:
            code:
              type: string
              description: '`/v1/agent/*` returns lowercase coarse codes (permission_denied, channel_not_member, not_found, invalid_input, conflict, rate_limited, upstream_unavailable, internal_error). `/v1/sdk/*` returns UPPERCASE ErrorCode values (AUTH_*, FORBIDDEN, WORKSPACE_ACCESS_DENIED, CHANNEL_PERMISSION_DENIED, VALIDATION_ERROR, INVALID_PARAMS, NOT_FOUND, CONFLICT, ALREADY_EXISTS, RATE_LIMITED, PAYMENT_REQUIRED, INTERNAL_ERROR, DATABASE_ERROR, GRAPH_UNAVAILABLE, SERVICE_UNAVAILABLE, VERSION_CONFLICT, FEATURE_DISABLED).'
            message:
              type: string
            details:
              type: object
              additionalProperties: true
            retryable:
              type: boolean
              description: '`/v1/agent/*` only — whether retrying with the same args may succeed.'
            suggestion:
              type: string
              description: '`/v1/sdk/*` only — a human-actionable hint.'
            docs:
              type: string
              description: '`/v1/sdk/*` only — a documentation URL.'
          required:
          - code
          - message
          additionalProperties: false
        meta:
          $ref: '#/components/schemas/Meta'
      required:
      - success
      - error
      additionalProperties: false
    UploadTarget:
      type: object
      properties:
        attachmentId:
          type: string
        uploadUrl:
          type: string
          format: uri
          description: Presigned GCS PUT URL.
        method:
          type: string
          enum:
          - PUT
        headers:
          type: object
          additionalProperties:
            type: string
          description: Headers the caller MUST send on the raw PUT.
        expiresAt:
          type: string
          format: date-time
        maxBytes:
          type: integer
          description: Workspace max file size in bytes.
      required:
      - attachmentId
      - uploadUrl
      - method
      - headers
      - expiresAt
      - maxBytes
      additionalProperties: false
    PaginationMeta:
      type: object
      properties:
        cursor:
          type:
          - string
          - 'null'
        hasMore:
          type: boolean
        total:
          type: integer
        historyCutoff:
          type:
          - object
          - 'null'
          properties:
            beyondCount:
              type: integer
            cutoffAt:
              type: string
              format: date-time
          required:
          - beyondCount
          - cutoffAt
          additionalProperties: false
      required:
      - hasMore
      additionalProperties: false
    Meta:
      type: object
      properties:
        requestId:
          type: string
        timestamp:
          type: string
          format: date-time
        pagination:
          $ref: '#/components/schemas/PaginationMeta'
      required:
      - requestId
      - timestamp
      additionalProperties: false
    UploadTargetEnvelope:
      type: object
      properties:
        success:
          type: boolean
          enum:
          - true
        data:
          $ref: '#/components/schemas/UploadTarget'
        meta:
          $ref: '#/components/schemas/Meta'
      required:
      - success
      - data
      additionalProperties: false
    DownloadTargetEnvelope:
      type: object
      properties:
        success:
          type: boolean
          enum:
          - true
        data:
          $ref: '#/components/schemas/DownloadTarget'
        meta:
          $ref: '#/components/schemas/Meta'
      required:
      - success
      - data
      additionalProperties: false
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: rl_ API key