Signed x402 attestations and bounty-packet preflight checks, paid per call in USDC on Base.
Connect Remote server
claude mcp add --transport http x402-attestation https://spore-x402.worker.beacon.host/mcp
{
"mcpServers": {
"x402-attestation": {
"url": "https://spore-x402.worker.beacon.host/mcp"
}
}
}
{
"servers": {
"x402-attestation": {
"type": "http",
"url": "https://spore-x402.worker.beacon.host/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://spore-x402.worker.beacon.host/mcp
Tools 6 found in our last check
x402_attestSigned x402-v2 attestation of a subject/delivery packet: artifact URLs live, sha256 digests match the bound refs, report coherent with evidence.
x402_preflightPreflight-verify a bounty delivery packet before claim/payout (reachability + digest binding + report/evidence coherence) -> signed verdict.
approval-checkCheck a token approval before signing it: reads the ERC-20 allowance (owner -> spender) live on Base and returns the raw allowance, an unlimited-approval flag and a risk verdict. Read-only, no keys, no transaction.
dns-preflightDNS MX TXT A records domain lookup with an email-deliverability verdict: A records, MX hosts, SPF (v=spf1) and DMARC policy, CAA, plus a signed ok/warn/fail verdict.
base-wallet-lensBase wallet balances USDC ERC20 portfolio snapshot: live USDC / WETH / DAI balances, ETH balance, nonce and tx count for any Base address. Read-only.
endpoint-checkCheck an x402 endpoint before paying it: fetch the unpaid 402 challenge of any x402 URL and verify it is payable and safe - HTTP 402, a parseable x402 v1/v2 challenge, network, asset, payTo, amount, whether the advertised resource URL is the URL you actually called, manifest con…
Details
| Endpoint | https://spore-x402.worker.beacon.host/mcp (Streamable HTTP) |
| First published | 21 Oct 2026 |
| Last updated | 21 Oct 2026 |
| Registry name | host.beacon.worker.spore-x402/x402-attestation |
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