{"uid":"cap_yIVsc1N2a4RjQRJaZDQxX","slug":"api-the402-ai-3322dde4","name":"the402.ai Thread Message Sender","description":"Send thread message (free with API key)","url":"https://api.the402.ai/v1/threads/thread_97db043d70da49a0/messages","method":"POST","headers":{},"bodySchema":{"type":"object","required":["id"],"properties":{"id":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VlHnBFCLIYJ3XZkUabDR4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Posts a new message to a specific conversation thread on the402.ai platform via API key authentication","exampleAgentPrompt":"Send the message 'Can you summarize the key findings from the last report?' to thread thread_97db043d70da49a0 on the402.ai.","exampleUseCases":null,"resultDescription":"Returns a confirmation of the posted message including the message ID, thread ID, timestamp, and the message content as stored in the thread.","failureModes":["Invalid or missing API key returns 401 Unauthorized","Thread ID not found returns 404 Not Found","Malformed message body returns 400 Bad Request","Rate limit exceeded returns 429 Too Many Requests","Payment or billing issue may return 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need to programmatically append a message to an existing thread on the402.ai platform, particularly in agentic workflows where conversation state is managed via thread IDs and low-cost per-call pricing ($0.001 USDC) is acceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T17:28:39.736Z","isFirstParty":false}