{"id":"ca573cc6-21c9-46ad-aac7-5ab6396d38ce","shortId":"cK7nBM","kind":"mpp","title":"Buy a dedicated US/CA phone number for 30 days via micropayment — $20.00 per number, USDC on Base.","tagline":"Buy a dedicated US/CA phone number for 30 days via micropayment — $20.00 per number, USDC on Base.","description":"POST /api/number is a paid endpoint on StablePhone that provisions a dedicated US or Canadian phone number for 30 days. You specify an optional 3-digit area code and country code (US or CA); if omitted, a random area code is assigned and US is the default. The endpoint costs $20.00, settled via x402 or MPP (USDC on Base / Tempo). On success it returns the provisioned E.164 phone number and its expiration timestamp.\n\nThe purchased number can be used as the outbound caller ID (the `from` field) when making AI phone calls through the companion POST /api/call endpoint ($0.54 per call). Numbers expire after 30 days but can be extended in 30-day increments at $15.00 each via POST /api/number/topup — top-ups stack, so you can prepay months ahead. To list all numbers owned by your wallet, use GET /api/numbers (free, SIWX auth).\n\nStablePhone requires no API keys or accounts. Authentication for paid endpoints is handled by the x402/MPP payment challenge (HTTP 402), while free read endpoints use SIWX (Sign-In With X) wallet authentication. The underlying telephony is powered by Bland.ai. Note that the endpoint only accepts POST requests — HEAD and GET return 405, which is expected behavior.","tags":["phone","call","voice","ai-call","imessage"],"capabilities":["phone-number-provisioning","us-ca-numbers","area-code-selection","30-day-lease","micropayment-auth","x402-payment","mpp-tempo-payment","usdc-on-base","no-api-key","wallet-auth"],"categories":["telephony","payments"],"synonyms":["buy phone number","provision phone number","virtual phone number","dedicated caller ID","DID number","temporary phone number","phone number rental","StablePhone number"],"warnings":["Probe returned 405 on HEAD/GET — endpoint is POST-only, which is normal but means the MPP challenge was not directly captured for this method","No inbound call/SMS capability documented — numbers appear to be outbound caller-ID only","Numbers expire after 30 days; must top up at $15.00/30 days to retain","/docs page returns 404 — no dedicated documentation site beyond the landing page and OpenAPI spec"],"endpointUrl":"https://stablephone.dev/api/number","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"stablephone.dev","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.850","qualityRationale":"Full OpenAPI schema with request/response definitions, clear pricing ($20.00), detailed guidance docs, and well-documented companion endpoints. The probe returned 405 because the endpoint is POST-only and was probed with HEAD/GET, which is expected. Deducted slightly because /docs returns 404 and there are no standalone docs pages beyond the landing page and 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'/api/number':36 '/api/number/topup':154 '/api/numbers':175 '0.54':133 '15.00':150 '20.00':12,29,85 '3':59 '30':8,25,53,139,146 '30-day-lease' '402':198 '405':231 'DID number' 'StablePhone number' 'accept':224 'account':185 'ahead':164 'ai':124 'api':182 'area':61,73 'area-code-selection' 'assign':76 'auth':178 'authent':186,211 'base':17,34,93 'behavior':235 'bland.ai':218 'buy':1,18 'buy phone number' 'ca':68 'call':126,135 'caller':117 'canadian':49 'challeng':196 'code':62,65,74 'companion':129 'cost':84 'countri':64 'day':9,26,54,140,147 'dedic':3,20,46 'dedicated caller ID' 'default':81 'digit':60 'e.164':101 'endpoint':40,83,132,189,202,222 'expect':234 'expir':106,137 'extend':144 'field':121 'free':176,200 'get':174,229 'handl':191 'head':227 'http':197 'id':118 'increment':148 'key':183 'list':166 'make':123 'micropay':11,28 'micropayment-auth' 'month':163 'mpp':90 'mpp-tempo-payment' 'no-api-key' 'note':219 'number':6,14,23,31,51,103,110,136,168 'omit':70 'option':58 'outbound':116 'own':169 'paid':39,188 'payment':195 'per':13,30,134 'phone':5,22,50,102,125 'phone number rental' 'phone-number-provisioning' 'post':35,130,153,225 'power':216 'prepay':162 'provis':44,100 'provision phone number' 'purchas':109 'random':72 'read':201 'request':226 'requir':180 'return':98,230 'settl':86 'sign':206 'sign-in':205 'siwx':177,204 'specifi':56 'stablephon':42,179 'stack':158 'success':96 'telephoni':214 'tempo':94 'temporary phone number' 'timestamp':107 'top':156 'top-up':155 'under':213 'up':157 'us':47,66,78 'us-ca-numbers' 'us/ca':4,21 'usdc':15,32,91 'usdc-on-base' 'use':113,173,203 'via':10,27,87,152 'virtual phone number' 'wallet':172,210 'wallet-auth' 'x':209 'x402':88 'x402-payment' 'x402/mpp':194","prices":[{"id":"6570c1b3-7e58-4104-bd54-bfa75b0b5522","listingId":"ca573cc6-21c9-46ad-aac7-5ab6396d38ce","amountUsd":"20","unit":"per_call","nativeCurrency":"pathUSD","nativeAmount":"20000000","chain":"tempo","payTo":null,"paymentMethod":"mpp-tempo","isPrimary":true,"details":{"realm":"stablephone.dev","intent":"charge","method":"tempo","dynamic":false,"decimals":6,"unit_type":null,"amount_hint":null,"raw_payment":{"amount":"20000000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"Buy a phone number (30 days)"},"asset_contract":"0x20c000000000000000000000b9537d11c60e8b50"},"createdAt":"2026-04-18T19:59:54.121Z"}],"sources":[{"listingId":"ca573cc6-21c9-46ad-aac7-5ab6396d38ce","source":"mpp_dev","sourceId":"stablephone:POST:/api/number","sourceUrl":"https://mpp.dev/api/services","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:54.121Z","lastSeenAt":"2026-04-22T01:15:09.994Z"}],"details":{"listingId":"ca573cc6-21c9-46ad-aac7-5ab6396d38ce","quickStartSnippet":"# 1. POST to buy a number (will return 402 — pay with x402/MPP client)\ncurl -X POST https://stablephone.dev/api/number \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"area_code\": \"415\", \"country_code\": \"US\"}'","exampleRequest":{"area_code":"415","country_code":"US"},"exampleResponse":{"success":true,"expires_at":"2025-07-14T00:00:00.000Z","phone_number":"+14155551234"},"schema":{"path":"/api/number","method":"POST","payment":{"amount":"20000000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"Buy a phone number (30 days)"},"description":"Buy a phone number (30 days)"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"POST /api/number costs $20.00 and provisions a phone number for 30 days","source_url":"https://stablephone.dev"},{"claim":"Supports US and CA country codes with optional 3-digit area code","source_url":"https://stablephone.dev"},{"claim":"Top-ups cost $15.00 and extend by 30 days; top-ups stack","source_url":"https://stablephone.dev"},{"claim":"Payment via x402 or MPP (USDC on Base / Tempo); no API keys or accounts required","source_url":"https://stablephone.dev"},{"claim":"Underlying telephony powered by Bland.ai","source_url":"https://stablephone.dev"}],"useCases":["Provisioning a dedicated outbound caller ID for AI phone call campaigns","Acquiring a local-area-code number for region-specific outreach","Giving an AI agent its own phone number for recurring call tasks","Setting up a temporary number for a 30-day project or event"],"bestFor":["AI agents that need a persistent outbound caller ID","Developers building automated calling workflows without traditional telecom accounts","Crypto-native applications that pay per resource with USDC"],"notFor":["Receiving inbound calls or SMS (no inbound routing documented)","Long-term number ownership without recurring top-ups","Non-US/CA phone numbers"],"kindDetails":{"docs":{"llmsTxt":"https://stablephone.dev/llms.txt","homepage":"https://stablephone.dev"},"tags":["phone","call","voice","ai-call","imessage"],"realm":"stablephone.dev","status":"active","methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}},"provider":{"url":"https://stablephone.dev","name":"Merit Systems"},"categories":["ai","social"],"service_id":"stablephone","integration":"first-party","service_name":"StablePhone","service_description":"AI phone calls, dedicated phone numbers, and iMessage/FaceTime lookup — pay per request."},"updatedAt":"2026-04-22T01:15:09.994Z"}}