Headless Oracle | Signed Market-Status API for AI Agents

# Headless Oracle > Ed25519-signed market-state attestations for 28 global exchanges. > Pre-trade verification gate for autonomous financial agents. > MCP server + REST API + x402 micropayments. Model-agnostic infrastructure. Works with any AI agent regardless of model tier — from GPT-5 nano to frontier reasoning models like Anthropic Mythos. Receipts are the same $0.05/MTok agents and $125/MTok agents both consume. Regulatory alignment: Ed25519 signed attestations with 60-second TTL meet SEC/CFTC cryptographic attestation requirements for tokenized collateral (Technical Framework for Tokenized Collateral — at least three independent oracle feeds with cryptographic attestation). Agents can pay for access autonomously via x402 protocol (USDC on Base mainnet) — no human API key provisioning required. Headless Oracle returns cryptographically signed receipts confirming whether an exchange is OPEN, CLOSED, HALTED, or UNKNOWN. Every receipt includes an Ed25519 signature with a 60-second TTL. UNKNOWN must be treated as CLOSED (fail-closed). Used as a pre-trade verification gate by autonomous trading agents. - [Full Documentation](https://headlessoracle.com/llms-full.txt): Complete API reference, schemas, and integration guides in one file. ## MCP Tools - [get_market_status](https://headlessoracle.com/mcp): Check if an exchange is open with signed Ed25519 receipt - [get_market_schedule](https://headlessoracle.com/mcp): Next open/close times, holidays, lunch breaks - [list_exchanges](https://headlessoracle.com/mcp): All 28 supported exchanges with MIC codes - [verify_receipt](https://headlessoracle.com/mcp): Verify an existing receipt's Ed25519 signature ## API Endpoints - [GET /v5/status](https://headlessoracle.com/docs): Signed market-state receipt (auth required) - [GET /v5/batch](https://headlessoracle.com/docs): Multi-exchange batch check (auth required) - [GET /v5/briefing](https://headlessoracle.com/docs): Daily market intelligence summary - [GET /v5/

{"openapi":"3.1.0","info":{"title":"Headless Oracle","version":"5.0.0","description":"Cryptographically signed market-state receipts for AI agents and automated trading systems. All signed receipts use Ed25519. Consumers MUST treat UNKNOWN status as CLOSED and halt execution. Receipts expire at expires_at — do not act on stale receipts.","contact":{"name":"Headless Oracle","email":"api@headlessoracle.com","url":"https://headlessoracle.com"},"license":{"name":"MIT","url":"https://github.com/Lem