MailPulse

The fleet's first ACTION origin — does something in the world instead of answering a question.

HealthVerify addressQuoteLettersx402 · USDC on Base

Browse the API For AI Agents

x402Native Payments

5Live Endpoints

$0.005Queries From

73Network Verticals

Catalog

API Catalog

Every endpoint returns structured JSON. No API keys, no accounts — payment is the authentication.

MailPulse Intelligence

/api/health Liveness + current mode $0.05

/api/verify-address Verify a mailing address (US + international) $0.01

/api/quote Free price quote for a letter $0.05

/api/letters Send a physical letter (THE paid action) $3.00

/api/letters/{id} Letter status / USPS tracking poll $0.005

Protocol

For AI Agents

MailPulse is x402-native: request any endpoint, receive HTTP 402 with payment terms, pay in USDC on Base, get your answer. One round-trip, no signup.

x402 · pay-per-query

$ curl "https://mailpulse.theaslangroupllc.com/api/health"
→ 402 Payment Required  { "accepts": [{ "network": "eip155:8453", "asset": "USDC", ... }] }
$ # pay with any x402 client — @x402/fetch, Bedrock AgentCore, agentic-wallet-skills
→ 200 OK  { structured JSON intelligence }

Discovery: agent.json · openapi.json · llms.txt · listed on the x402 Bazaar

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