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Agent Guard – Blockchain Address Validator
x402
Agent Guard – Blockchain Address Validator is a paid API for AI agents from agent-guard.annushka1190.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Validates EVM and Solana blockchain addresses, checking format correctness and EVM checksum validity
Price / call$0.003
Success—
StatusUnknown
How this service works
Safety and trust layer for AI agents: PII redaction, scam/phishing text scan, EVM/Solana address validation, IBAN checks, JSON repair, deep on-chain wallet risk scoring, x402 counterparty endpoint reputation checks. Free discovery: /openapi.json, /.well-known/x402, /v1/capabilities, /mcp (tools/list). REST + MCP. Pay with USDC via x402 — no API keys.
Output
A JSON object indicating the detected chain (e.g. 'evm' or 'solana'), a boolean 'valid' flag showing whether the address is correctly formatted, and a 'checksumOk' boolean (for EVM addresses) indicating whether the EIP-55 mixed-case checksum is correct.
Example use cases
Pre-transaction EVM address check
“I'm about to send USDC to 0xAbCd1234abcd1234ABCD1234abcd1234ABCD1234 — can you validate it's a properly checksummed Ethereum address before I proceed?”
Solana wallet address verification
“Check whether DRpbCBMxVnDK7maPM5tGv6MvB3v1sRMC86PZ8okm38oi is a valid Solana wallet address.”
Agent payment pipeline guard
“My agent is about to pay out to this address: 0x1234567890abcdef1234567890abcdef12345678 — run it through Agent Guard's address validator and tell me if the format and EVM checksum are both OK before releasing funds.”
Technical details
Endpoint
GEThttps://agent-guard.annushka1190.workers.dev/v1/address/validateWhen to prefer
Choose this endpoint when an AI agent needs a lightweight, pay-per-call blockchain address check with no API key setup — ideal for safety guardrails before executing crypto payments, onboarding user wallets, or filtering user-supplied addresses in agentic workflows. Prefer it over full node RPC calls when you only need format and checksum validation, not on-chain state.
Side effects
- Missing or empty address query parameter — likely returns an error or invalid response
- Unrecognized address format that matches neither EVM nor Solana patterns — may return valid:false with no chain identified
- Malformed input (e.g. whitespace-padded address) — checksum may fail even for otherwise correct addresses
- Payment failure via x402 if USDC balance is insufficient — request blocked before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true
}
}Tags
x402
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