> ## Documentation Index > Fetch the complete documentation index at: https://docs.echozero.app/llms.txt > Use this file to discover all available pages before exploring further. # Global AI chat > Mirrors GraphQL `aiChat`. ## OpenAPI ````yaml https://mcp.echozero.app/api/docs-json post /api/v1/ai/chat openapi: 3.0.0 info: title: EchoZero MCP API description: >- EchoZero MCP Server - Developer API for agent management, trading, marketplace, and AI chat. **Rate Limiting:** All endpoints enforce per-API-key rate limits. Tiers: free (60 req/min), standard (300 req/min), premium (1000 req/min). Every response includes `X-RateLimit-Limit`, `X-RateLimit-Remaining`, `X-RateLimit-Reset` headers. Exceeding the limit returns `429 Too Many Requests` with a `Retry-After` header. version: '1.0' contact: {} servers: - url: https://mcp.echozero.app description: Production security: [] tags: - name: MCP Protocol description: >- Model Context Protocol (Streamable HTTP): `/mcp`, `/mcp/sse` — not under `/api`; same API key as REST - name: Health description: Server health check - name: API Keys description: API key generation, listing, and revocation - name: User description: >- User profile, sessions, social, onboarding, internal agent subscriptions, and bot activations (v1: /v1/users/me) - name: Token description: Token data and trending - name: Trade description: Trade execution and history - name: Strategy description: Strategy (trading bot) configuration and control - name: Agent description: Agent registration and management - name: AI description: AI chat, intent, and insights - name: Wallet description: Wallet operations, deposits, and withdrawals - name: Notification description: Notification management and settings - name: Auth description: >- Public authentication: signup / login lookup, code verification, Google OAuth, refresh, and sign-out. Returns `accessToken` / `refreshToken` in the JSON body. - name: OAuth description: >- OAuth 2.1 authorization-code + PKCE for AI assistant clients: `/oauth/authorize`, `/oauth/token`, `/oauth/introspect`, `/status`. - name: Activity description: User trade activity list and search - name: Feed description: Social activity feed timeline - name: Earn description: Leaderboard, rewards, and referrals - name: Statics description: Countries, languages, and static data - name: Misc description: File uploads and utility endpoints - name: Developer description: Developer registration and profile - name: Developer dashboard description: >- Per-agent dashboard: subscribers (anonymized), performance detail, signal history (v1) - name: Developer Agent description: Developer agent listings and management - name: Developer Agents (Marketplace) description: Public browse, search, and subscribe to external developer-listed agents - name: Admin description: Admin-only endpoints for review, approval, and platform management - name: Webhooks description: >- Inbound provider webhooks (no API key). Telegram signal-bot uses `X-Telegram-Bot-Api-Secret-Token` when configured. paths: /api/v1/ai/chat: post: tags: - AI summary: Global AI chat description: Mirrors GraphQL `aiChat`. operationId: McpAiController_aiChat parameters: - name: x-signature in: header required: false description: >- HMAC-SHA256 signature: HMAC-SHA256(secretKey, timestamp + METHOD + path + body). Optional -- when omitted, HMAC verification is skipped. schema: type: string - name: x-timestamp in: header required: false description: >- Request timestamp in epoch milliseconds. Required when x-signature is provided. Rejected if drift exceeds 5 minutes. schema: type: string requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/McpAiChatBodyDto' examples: minimal: summary: Single message value: message: What is the market sentiment for SOL today? fullAllFields: summary: Continue global chat with agent context value: message: Compare this agent to a momentum strategy. conversationId: 507f1f77bcf86cd799439011 agentId: 507f1f77bcf86cd799439012 responses: '200': description: AI reply payload. content: application/json: schema: allOf: - $ref: '#/components/schemas/McpSuccessResponseDto' - properties: data: $ref: '#/components/schemas/McpAiChatResponseDataDto' '400': description: Validation error. content: application/json: schema: $ref: '#/components/schemas/McpErrorResponseDto' '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/McpErrorResponseDto' '429': description: Rate limit exceeded. content: application/json: schema: $ref: '#/components/schemas/McpErrorResponseDto' security: - api-key: [] components: schemas: McpAiChatBodyDto: type: object properties: message: type: string description: User message maxLength: 5000 conversationId: type: string description: Existing conversation id agentId: type: string description: Target internal agent id required: - message McpSuccessResponseDto: type: object properties: success: type: boolean example: true data: type: object description: Endpoint-specific payload additionalProperties: true required: - success - data McpAiChatResponseDataDto: type: object properties: conversationId: type: string messages: type: array items: $ref: '#/components/schemas/McpAiChatMessageDataDto' escalated: type: boolean withHumanAgent: type: boolean suggestions: type: array items: $ref: '#/components/schemas/McpAiChatSuggestionDataDto' required: - conversationId - messages McpErrorResponseDto: type: object properties: success: type: boolean example: false error: $ref: '#/components/schemas/McpErrorBodyDto' required: - success - error McpAiChatMessageDataDto: type: object properties: role: type: string content: type: string step: type: string required: - role - content McpAiChatSuggestionDataDto: type: object properties: label: type: string message: type: string required: - label - message McpErrorBodyDto: type: object properties: code: type: string example: NOT_FOUND message: type: string example: Resource not found required: - code - message securitySchemes: api-key: type: apiKey in: header name: x-api-key ````