StableLinq

iMessage, RCS & SMS for agents

Full Linq Partner API v3 behind x402 and MPP micropayments. Send and manage chats with USDC — no API keys, no accounts. Agents pay per call; reads are free with SIWX and scoped to your wallet via GET /api/account/*.

• Discovery: GET /.well-known/x402
• OpenAPI: GET /openapi.json
• Agent guidance: GET /llms.txt

Cold outbound to new recipients: $0.50/recipient (50/day cap), text-only opener; cold-only sends pay max(cold fee, surge slot price). Warm follow-ups use surge pricing ($0.05–$1.25). All messages send from +12052438809 — not configurable via the API.