MailPulse

Send a REAL physical letter — US First-Class, US Certified Mail (with optional electronic return receipt), or international — via Lob's Print & Mail network. ACTION API, not a data lookup: paying causes a real letter to be printed and mailed. Flow: free quote -> paid send -> optional status/tracking poll. Pay-per-call via x402 on Base.

Skills

• Send Physical Letter
  Prints and mails a real physical letter (US First-Class, US Certified, or international) via Lob once payment settles. ACTION, not a data lookup. Requires a free /api/quote first. $3.00-$14.00 pay-per-call via x402 (USDC, Base). Parameters and pricing: https://mailpulse.theaslangroupllc.com/openapi.json
  send-physical-lettercertified-mailuspsphysical-mailactionx402pay-per-call
• Address Verification
  Deliverability check (US + international) via Lob address verification, before you pay to print a letter. $0.01 pay-per-call via x402 (USDC, Base). Parameters and pricing: https://mailpulse.theaslangroupllc.com/openapi.json
  address-verificationuspsdeliverabilityx402pay-per-call
• Free Letter Quote
  Free, exact price quote and signed quote_id for a prospective letter — no charge, no Lob call. Required first step before POST /api/letters. Parameters: https://mailpulse.theaslangroupllc.com/openapi.json
  quotepricingfree
• Letter Status / USPS Tracking
  Cheap status and USPS tracking poll for a previously sent letter. $0.005 pay-per-call via x402 (USDC, Base). Parameters and pricing: https://mailpulse.theaslangroupllc.com/openapi.json
  usps-trackingmail-statusx402pay-per-call
• MailPulse full catalog
  All endpoints with parameters, prices and examples: https://mailpulse.theaslangroupllc.com/openapi.json and https://mailpulse.theaslangroupllc.com/llms.txt
  catalogopenapix402

How to call

https://mailpulse.theaslangroupllc.com

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