{"uid":"cap_tEJVIuA0oSJHMJd2EBjBL","slug":"gambit-handwritten-letter-mail-service-b71be9de","name":"Gambit Handwritten Letter Mail Service","description":"Gambit GPU shop. Humans: /signup ($1 credit), X-API-Key on /v1/*, QR Lightning top-up. Bots: L402 Lightning (LIVE) on /l402/*, x402 USDC on Base on /x402/*, or POST /v1/register ($0) then POST /v1/topup/lightning. Handwritten letter POST /x402/letter at $25.00 USDC. Funnel https://gambit.barrioenergy.com. Free probe GET|POST /x402/models.","url":"https://gambit.barrioenergy.com/x402/letter","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"body":{"type":"string"},"to_name":{"type":"string"},"from_name":{"type":"string"},"to_address":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"note":"Ivan will handwrite and mail","job_id":"00000000-0000-0000-0000-000000000000","status":"paid"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"25","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$25/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"25","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"25","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wTRXx1Mw9_bwbfbx7dM_8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"25","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Submits a handwritten letter request that is physically handwritten by a person and mailed to a specified recipient, paid via USDC on Base (x402 protocol).","exampleAgentPrompt":"Can you have Ivan handwrite and mail a letter to Jane Doe at 123 Main St, Springfield, IL 62701 that says 'Dear Jane, thinking of you during this time. Warmly, John'? Pay the $25 USDC fee.","exampleUseCases":[{"title":"Heartfelt condolence letter by mail","prompt":"Please send a handwritten letter to Mary Johnson at 456 Oak Avenue, Austin TX 78701 from me — it should say 'Dear Mary, I was so sorry to hear about your loss. You are in my thoughts. With love, Sarah.'"},{"title":"Business thank-you note to a client","prompt":"I need a handwritten thank-you letter mailed to Robert Chen at 789 Corporate Blvd, San Francisco CA 94105 — the message should be 'Dear Robert, thank you for your continued partnership. We truly value working with you. Best, Acme Corp.'"},{"title":"Personal birthday greeting via post","prompt":"Send a handwritten birthday card letter to my grandmother, Eleanor Walsh, at 22 Maple Lane, Portland OR 97201 — write something like 'Dear Grandma, wishing you the happiest birthday! You mean the world to us. All my love, Tommy.'"}],"resultDescription":"Returns a JSON object confirming the order was received and paid, including a unique job_id (UUID), an ok flag set to true, a status of 'paid', and a note confirming that Ivan will handwrite and mail the letter.","failureModes":["Missing required fields (body, to_name, from_name, to_address) result in a validation error","Payment failure via x402/USDC on Base results in a 402 Payment Required response","Invalid or undeliverable mailing address may cause fulfillment failure post-payment","Network or server errors may return 5xx responses"],"whenToPreferThis":"Choose this endpoint when you need a physical, handwritten letter delivered via postal mail rather than a digital message — ideal for personal correspondence, formal thank-you notes, or situations where a tangible human-written letter carries more weight than email or SMS. It is uniquely suited for AI agents operating with x402 USDC payment capabilities on the Base blockchain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:30:19.102Z","isFirstParty":false}