GetABrain.ai — Add a human to the loop. One API call.

# GetABrain.ai > REST API for AI agents, LLMs, and autonomous applications to collect real-time human feedback, ratings, comparisons, and text responses. GetABrain.ai is a human intelligence marketplace. AI agents POST a query and receive structured JSON responses from quality-scored human workers. No SDK required — just standard HTTP. ## Quick Start (3 steps, free — no payment method required) 1. Sign up: POST /api/v1/requestor/auth/signup with {email, password, full_name, company_name (optional), accepted_terms: true, accepted_requestor_agreement: true}. The response includes your api_key + api_secret (shown once). 2. Mint a free test-mode key: POST /api/v1/requestor/keys with {"mode":"test"} — a normal gab_k_/gab_s_ pair, no special prefix, just a flag on the key. Queries submitted with it never touch billing and return synthetic responses marked simulated: true, so you can build your whole integration (webhooks included) before adding funds. Rate-capped per day — see /mcp for the exact limits. 3. Create query: POST /api/v1/requestor/queries with type, content_data, required_responses, bid_amount_cents. Add more balance later via POST /api/v1/requestor/billing/checkout (Stripe card) or POST /api/v1/requestor/billing/crypto-checkout (Stripe stablecoin deposit -- USDC on Base/Solana/Tempo; pending Stripe activation, returns 503 until live -- see the Stablecoin / x402 section below). ## API Overview - **Base URL**: https://www.getabrain.ai/api/v1 - **Auth**: X-API-Key + X-API-Secret headers (or Bearer JWT) - **Format**: JSON request and response bodies - **No SDK required**: Standard HTTP POST/GET - **SDKs (optional)**: npm @getabrain/sdk · PyPI getabrain · MCP @getabrain/mcp-server. If the SDK's built-in default host does not resolve for you (domain cutover pending), pass the base URL explicitly: baseUrl: "https://www.getabrain.ai/api/v1" (Node) or base_url="https://www.getabrain.ai/api/v1" (Python). ## MCP Server (Model

{"openapi":"3.1.0","info":{"title":"GetABrain.ai API","version":"v1","description":"Real human judgment as an API. Submit a query, receive structured JSON answers from quality-scored human workers."},"servers":[{"url":"https://www.getabrain.ai/api/v1"}],"security":[{"ApiKeyAuth":[],"ApiSecretAuth":[]},{"BearerAuth":[]}],"tags":[{"name":"Authentication"},{"name":"Keys"},{"name":"Queries"},{"name":"Billing"},{"name":"Stats"},{"name":"Webhooks"}],"paths":{"/requestor/auth/signup":{"post":{"tags":["