# SignalLayer

SignalLayer provides a free deterministic task router plus three machine-native paid primitives for autonomous agents.

Selection:
- signal_layer_router: FREE. Call when the task is known but the correct SignalLayer primitive is uncertain. Returns no_match or one recommendation with price, missing inputs, and ready-to-call HTTP/MCP arguments.
- agent_preflight: call BEFORE paying or interacting with an unfamiliar machine resource or Base address. $0.01 USDC.
- market_execution_intel: call BEFORE an exact-in ERC-20 swap on Base when live execution conditions matter. $0.03 USDC.
- structured_extract: call when facts exist on a public webpage but structured JSON is required. $0.02 USDC.

Do not use agent_preflight for trading analysis.
Do not use market_execution_intel for generic historical prices or investment advice.
Do not use structured_extract for generic web search or already-structured data.

Free discovery:
GET/POST https://signallayer.floot.app/_api/v1/router
GET https://signallayer.floot.app/_api/tools
GET https://signallayer.floot.app/_api/openapi
GET https://signallayer.floot.app/_api/llms
GET https://signallayer.floot.app/skill.md

MCP: https://signallayer.floot.app/_api/mcp

Payment: x402 V2 exact, Base mainnet eip155:8453, USDC.
Facilitator: https://facilitator.payai.network
HTTP unpaid requests return 402 + PAYMENT-REQUIRED.
MCP unpaid paid-tool calls return PaymentRequired in structuredContent and content text.

Test: GET https://signallayer.floot.app/_api/v1/agent/preflight-test
Base Sepolia eip155:84532, $0.01 test USDC.