Power Pack — Outreach Email Scoring (RAEN x402)

Score an outreach email for $0.01 USDC on eip155:8453: subject/body quality, predicted open rate, spam risk, tone, length, personalization, CTA clarity — plus top 3 improvements and a rewritten subject line. Pay per call via x402 — no API keys, no subscription. Free surfaces: GET /sample (synthetic output shape), GET /openapi.json, GET /docs, GET /pricing.md, GET /llms.txt, GET /about, GET /health, GET /.well-known/x402.json.

Skills

• Paid outreach email scoring guide
  Explains how to buy POST /api/score-email ($0.01 USDC on eip155:8453): body { subject (>=3 chars), body (>=20 chars), recipient_context? }; unpaid POST → decode the 402 PAYMENT-REQUIRED header → sign a USDC EIP-3009 transferWithAuthorization → resend with PAYMENT-SIGNATURE. Returns a quality score, predicted open rate (uncalibrated model estimate, not measured deliverability), spam risk, top 3 improvements, and a rewritten subject line. Invalid input returns 400 and is not charged.
  outreachemailsalesspam-riskx402usdc
• Free sample + schema preview
  Points to the free validation surfaces before any payment: GET /sample returns the exact paid output shape (synthetic), GET /openapi.json and GET /docs carry the full input/output contract, GET /pricing.md and GET /llms.txt describe the endpoint and price.
  sampleopenapifreepricingpreview
• Machine-readable discovery surfaces
  Guides agents to this wall's free machine surfaces: /pricing.md, /llms.txt, /openapi.json, /about, /.well-known/x402.json (live 402 accepts), /.well-known/agent-card.json (this card), POST /a2a (A2A v1 JSON-RPC).
  discoveryopenapix402a2ajson

How to call

https://power-pack-x402.fly.dev/a2a

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