Pay-per-call in USDC on Base
Built for AI agents. Each request carries a signed USDC authorization; we verify, settle, and return the answer. No signup, no API key, no subscription.
At a glance
- Protocol
- x402 v2 over HTTP (see coinbase/x402)
- Network
- Base mainnet
- Settlement
- USDC (ERC-3009 transferWithAuthorization)
- Facilitator
- Coinbase Developer Platform (KYT + OFAC screening handled)
- Merchant address
- 0xCca4725e0e931982830bff523b141E1A7a58d3E7
Endpoints + pricing
| Endpoint | Per call | Summary |
|---|---|---|
| POST /api/x402/v1/email/verify | $0.005 USDC | Deliverability check via SMTP RCPT probe |
| POST /api/x402/v1/email/validate | $0.003 USDC | DNS-only deliverability check (syntax + MX + disposable + role) |
| POST /api/x402/v1/email/find | $0.010 USDC | Find working email via sequential SMTP pattern probing |
| POST /api/x402/v1/linkedin/find-url | $0.008 USDC | Find LinkedIn profile URL via public search engines |
| POST /api/x402/v1/prospects/search | $0.012 USDC | Search the shared prospect pool by tag overlap |
Machine-readable spec at api.bavlio.com/openapi.json (includes x-agent-examples for each endpoint). Human-readable docs: /docs (Swagger UI) and /redoc.
Example
# 1. GET the endpoint first. It returns HTTP 402 with x402 payment requirements.
curl -i https://api.bavlio.com/api/x402/v1/email/verify \
-X POST \
-H "Content-Type: application/json" \
-d '{"email": "[email protected]"}'
# Response (402 Payment Required) includes 'x-payment' hints with:
# - network: base-mainnet
# - pay_to: 0xCca4725e0e931982830bff523b141E1A7a58d3E7
# - price: 5000 (atomic USDC = $0.005)
# 2. Sign a USDC transferWithAuthorization with your CDP wallet and resubmit.
# The x402 library (Python/TS) handles the signing + retry automatically:
#
# from x402.clients.requests import X402Client
# client = X402Client(wallet=your_cdp_wallet, network="base-mainnet")
# response = client.post("https://api.bavlio.com/api/x402/v1/email/verify",
# json={"email": "[email protected]"})Discovery: AgentCash + scanners
Bavlio ships with an AgentCash skill definition so autonomous agents can discover + invoke the 5 endpoints without human configuration. The same catalog feeds x402scan, x402.direct, and the x402 Bazaar (`x402.extensions.bazaar`). Listings return the live merchant address, pricing, and endpoint list — always sourced from api.bavlio.com/openapi.json.
Want an API key instead?
Bavlio customers on a SaaS plan can hit the same data via the traditional API-key authenticated REST endpoints. Usage draws from your plan credits instead of settling on-chain per call.