{"uid":"cap_1fKUN2gFIEp1f_-FoKaCs","slug":"stablephone-call-9dc16e0e","name":"StablePhone AI Call","description":"Make an AI phone call ($0.54). Send a phone number and task, get back a call_id to track status. Returns 403 if the number is on the Do-Not-Call (DNC) list — do not retry DNC numbers.","url":"https://stablephone.dev/api/call?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["phone_number","task"],"properties":{"from":{"type":"string","pattern":"^\\+1\\d{10}$"},"task":{"type":"string","maxLength":4000,"minLength":1},"model":{"enum":["base","turbo"],"type":"string"},"voice":{"type":"string"},"record":{"type":"boolean"},"metadata":{"type":"object","propertyNames":{"type":"string"},"additionalProperties":{}},"max_duration":{"type":"integer","maximum":30,"minimum":1},"phone_number":{"type":"string","pattern":"^\\+1\\d{10}$"},"first_sentence":{"type":"string","maxLength":500},"voicemail_action":{"enum":["hangup","leave_message","ignore"],"type":"string"},"voicemail_message":{"type":"string","maxLength":500},"wait_for_greeting":{"type":"boolean"},"transfer_phone_number":{"type":"string"}},"additionalProperties":false},"responseSchema":{"type":"object","required":["success","call_id","message"],"properties":{"call_id":{"type":"string"},"message":{"type":"string"},"success":{"type":"boolean","const":true}},"additionalProperties":false},"example":{"request":{"task":"Hello, this is a test call to verify the system is working. Please press 1 if you received this message.","model":"base","max_duration":5,"phone_number":"+12025550123","voicemail_action":"hangup","wait_for_greeting":true},"response":{"call_id":"0c17a95c-db49-4e75-ab02-5d1fc29e6237","message":"Call successfully queued.","success":true}},"exampleRequest":{"task":"Hello, this is a test call to verify the system is working. Please press 1 if you received this message.","model":"base","max_duration":5,"phone_number":"+12025550123","voicemail_action":"hangup","wait_for_greeting":true},"tags":["phone","call","voice","ai-call","imessage","ai","social"],"displayCostAmount":"0.54","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":16,"rating":{"score":"0.86","successRate":"0.90","reviews":16,"stars":"4.5","state":"rated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.54/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.54","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.54","per":"call","confidence":"exact"},{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.54","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7yiaS_l8U7Qk2IzWPpulP","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.54","costPer":"request","priority":0,"asset":"0x20c000000000000000000000b9537d11c60e8b50","unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_73laqOoKwVonrwlcVnWsJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.54","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"StablePhone","brandSlug":"stablephone","brandBaseUrl":"https://stablephone.dev","brandDocsUrl":"https://stablephone.dev","whatItDoes":"Initiates an AI-powered outbound phone call to a US number with a specified task/script, returning a call_id for status tracking.","exampleAgentPrompt":"Call +12025550123 and tell them their package has arrived and they should pick it up by 5pm today — if they don't answer, leave a voicemail with the same message and hang up after 5 minutes.","exampleUseCases":null,"resultDescription":"Returns a JSON object with success: true, a UUID call_id to track the call's progress and retrieve the transcript later, and a confirmation message ('Call successfully queued.').","failureModes":["403 Forbidden — phone number is on the Do-Not-Call (DNC) list; do not retry","402 Payment Required — insufficient balance or payment not provided","400 Bad Request — invalid phone number format (must be E.164 US +1XXXXXXXXXX) or task too long/empty","500 Internal Server Error — call could not be queued"],"whenToPreferThis":"Use this endpoint when you need to deliver spoken information or gather responses via an outbound phone call to a US number, especially for appointment confirmations, reminders, or notifications. Prefer over SMS/email when voice interaction is required or when the recipient is more likely to respond to a call.","instructions":null,"reviewSummary":"Reliably queues outbound AI phone calls to US numbers in 2–5 seconds, with strong live-call performance including multi-turn conversation, improvised responses, and clean voicemail detection and message delivery. Transcripts and call status are available via a free poll endpoint. One payment-flow failure (402) was reported; pricing at $0.54/call is noted as high relative to underlying API costs.","reviewSummaryHighlights":["Fast call queuing: typically 2–5 seconds to receive a call_id","Handles both live pickups and voicemail cleanly, with per-utterance transcripts available free","Adaptive multi-turn conversation on live calls, not just one-way TTS delivery"],"reviewSummaryConcerns":["At least one 402 payment-flow failure with no call placed and no fallback","$0.54/call considered expensive for simple TTS use cases; underlying API cost is significantly lower","phone_number must be E.164 (+1XXXXXXXXXX); wait_for_greeting default can cause early hangups on voicemail"],"reviewSummaryGeneratedAt":"2026-09-03T16:15:08.658Z","activationCount":106,"lastUsedAt":"2026-09-03T12:54:51.788Z","lastSuccessfullyRanAt":"2026-09-03T12:54:51.788Z","lastHealthCheckAt":"2026-10-12T18:31:40.320Z","isFirstParty":false,"canonicalSlug":"stablephone-call-9dc16e0e"}