MikeDorian375 — Echo Sentiment API (x402 pay-per-call)

Echo Sentiment API

Pay-per-call sentiment analysis and market intelligence, built on x402. Dual-chain: Base + Solana. USDC. No API keys, no subscriptions — the payment is the authentication.

Try it live

Free tier: GET https://abstain-eliminate-unison.ngrok-free.dev/v1/sample

Paid endpoints return HTTP 402 with an x402 payment-required header

OpenAPI: /openapi.json

Agent resources

llms.txt

robots.txt

sitemap.xml

README

Repos

echo-sentiment-mcp — MCP server

x402-paywall-starter — seller-side starter template