Anyone
No account- Search the x402 marketplace by voice
- Pay for and call any API — results read back live
- Ask about Dexter, x402, the ecosystem
- Session-funded payments via OpenDexter
Call an AI agent.
Dial Dexter, ask for what you need, and get it done. Search the x402 marketplace, pay for API calls, get results — all by voice. No app, no browser, no account required.
+1 (561) 940-2402Tap to call · works from any phone
How a call works
Dexter picks up immediately. The conversation is real-time — no hold music, no menu tree, no transcribe-and-respond delay. Audio flows bidirectionally.
1
Call the number
Dial +1 (561) 940-2402. Dexter answers and greets you within a second.
2
Ask for something
“Find me a sentiment API for SOL under ten cents.” Dexter searches the marketplace.
3
Dexter pays and calls
Picks the best result, pays with USDC through the x402 facilitator, reads you the response.
4
Links get texted
URLs, addresses, detailed results — anything easier to read gets sent as an SMS during the call.
What you get
The baseline works for everyone. Link your phone number at dexter.cash/profile to unlock identity, wallet, and memory.
Linked phone
Optional- Dexter greets you by name
- Wallet access after SMS verification
- Conversation memory across calls
- Persistent spend session — fund once, use across calls
Tools available on the call
Dexter has access to the full x402 toolset plus phone-native tools for SMS and verification.
x402_search
Find paid APIs on the Dexter marketplace. Ask for something specific or say "show me what's available" — Dexter searches and reads back the top results.
x402_pay
Call any x402 endpoint and pay for it with USDC. Dexter handles the payment protocol and reads you the response.
send_sms
Dexter texts you links, wallet addresses, results, or anything easier to read than hear. No long URLs read aloud.
Verification
SMS OTP before any wallet operation. Dexter texts a 6-digit code, you read it back. Verified for the rest of the call.
open_session_status
Check your OpenDexter spend session balance and get funding instructions texted to your phone if needed.
Under the hood
VoiceOpenAI Realtime API — bidirectional audio over WebSocket, no transcribe-and-respond loop
TelephonyTwilio Programmable Voice + Media Streams
Agent@openai/agents SDK with TwilioRealtimeTransportLayer
ToolsDexter Open MCP Gateway — x402_search, x402_pay, x402_fetch
Paymentsx402 v2 via Dexter Facilitator — Solana + 5 EVM chains
IdentitySTIR/SHAKEN attestation + Dexter API phone-to-account lookup
MemoryPer-caller call log with topic summaries and tool history
Security
No auth needed for search and API calls. The marketplace tools work for everyone. Paid calls use OpenDexter session wallets — no personal wallet exposed.
SMS OTP gates wallet operations. Dexter texts a 6-digit code before touching any funds. Verification resets when the call ends.
STIR/SHAKEN attestation logged. Caller attestation level is recorded for every inbound call. Spoofed numbers are flagged.
No secrets spoken. Private keys, seed phrases, and full wallet balances are never read aloud. Anything sensitive goes via SMS.