{"uid":"cap_paqnxsYz4GPRfTYiNW4uv","slug":"gambit-handwritten-letter-service-aa8d2b3d","name":"Gambit Handwritten Letter Service","description":"Gambit GPU shop. Pay with L402 Lightning on /l402/* or x402 USDC on Base on /x402/*. Handwritten letter POST /x402/letter at $25.00 USDC. Funnel https://spark-2f53.tail8a7863.ts.net/gambit. Cheap probe GET|POST /x402/models at $0.01 USDC.","url":"https://spark-2f53.tail8a7863.ts.net/gambit/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":"down","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_Us932ie7KgiZ9_Wgo0_Kx","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":"Accepts letter content and recipient details, then has Ivan physically handwrite and mail the letter to the specified address, charged at $25 USDC via x402.","exampleAgentPrompt":"Can you send a handwritten letter from me (James Hartley) to Sarah Collins at 42 Maple Street, Austin TX 78701? The message should say: 'Dear Sarah, I just wanted to reach out and say how much your friendship has meant to me over the years. Wishing you all the best in your new chapter. Warmly, James.'","exampleUseCases":[{"title":"Personal thank-you note to a mentor","prompt":"Please send a handwritten letter from me, Alex Rivera, to Dr. Patricia Moore at 15 Oak Avenue, Boston MA 02101. Write: 'Dear Dr. Moore, I wanted to personally thank you for your guidance during my thesis — it made all the difference. With gratitude, Alex.'"},{"title":"Condolence letter to a grieving friend","prompt":"I want to send a handwritten condolence letter to Tom Nguyen at 88 Birchwood Lane, Denver CO 80203, from me, Claire Bennett. The message is: 'Dear Tom, Words feel inadequate right now, but please know you are in my thoughts. I'm so sorry for your loss. With love, Claire.'"},{"title":"Business appreciation letter to a client","prompt":"Send a handwritten letter on behalf of Marcus Webb to our client Linda Forsythe at 200 Commerce Blvd, Suite 5, Chicago IL 60601. Message: 'Dear Linda, It has been a true pleasure working with you this year. Your trust means everything to us. Warm regards, Marcus Webb.'"}],"resultDescription":"Returns a JSON object with ok: true, a unique job_id UUID for tracking, a status field indicating 'paid', and a note confirming that Ivan will handwrite and mail the letter.","failureModes":["Missing required fields (body, to_name, from_name, to_address) results in a validation error","Payment of $25 USDC via x402 not completed — request rejected with 402 Payment Required","Invalid or undeliverable mailing address may result in fulfillment failure after payment","Service unavailability (Tailscale node offline) returns a connection error","Malformed request body returns a 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when a user explicitly wants a physically handwritten and mailed letter — not an email, digital message, or printed letter. It is uniquely suited for personal, heartfelt, or high-touch correspondence where the human handwriting aspect is the key value. There is no known competitor offering the same human handwriting + physical mailing combination via a pay-per-use API.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T17:27:38.450Z","isFirstParty":false}