{"id":11871,"name":"MailPulse","description":"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. 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Parameters and pricing: https://mailpulse.theaslangroupllc.com/openapi.json"},{"id":"address-verification","name":"Address Verification","tags":["address-verification","usps","deliverability","x402","pay-per-call"],"description":"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"},{"id":"letter-quote","name":"Free Letter Quote","tags":["quote","pricing","free"],"description":"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"},{"id":"mail-tracking","name":"Letter Status / USPS Tracking","tags":["usps-tracking","mail-status","x402","pay-per-call"],"description":"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"},{"id":"catalog","name":"MailPulse full catalog","tags":["catalog","openapi","x402"],"description":"All endpoints with parameters, prices and examples: https://mailpulse.theaslangroupllc.com/openapi.json and https://mailpulse.theaslangroupllc.com/llms.txt"}],"version":"1.0.0","provider":{"url":"https://theaslangroupllc.com","organization":"The Aslan Group LLC"},"description":"Send a REAL physical letter — US First-Class, US Certified Mail (with optional electronic return receipt), or international — via Lob's Print & Mail network. 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Parameters and pricing: https://mailpulse.theaslangroupllc.com/openapi.json","tags":["address-verification","usps","deliverability","x402","pay-per-call"],"quality_warning":false},{"skill_id":"letter-quote","name":"Free Letter Quote","description":"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","tags":["quote","pricing","free"],"quality_warning":false},{"skill_id":"mail-tracking","name":"Letter Status / USPS Tracking","description":"Cheap status and USPS tracking poll for a previously sent letter. $0.005 pay-per-call via x402 (USDC, Base). 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