Official MCP RegistryListed

SPORE x402 Attestation

Signed x402 attestations and bounty-packet preflight checks, paid per call in USDC on Base.

First seen 21 Oct 2026. Evidence as of 9 Nov 2026.

Tools

From an anonymous probe

Source listings

Each with its own history

Recorded changes

Since first seen

Tools

Tool	Description	Behaviour
approval-check	Check 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.	Not declared
base-wallet-lens	Base wallet balances USDC ERC20 portfolio snapshot: live USDC / WETH / DAI balances, ETH balance, nonce and tx count for any Base address. Read-only.	Not declared
dns-preflight	DNS 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.	Not declared
endpoint-check	Check 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 consistency (/.well-known/x402.json), header-size overflow risk for Node clients, and a signed pay / caution / avoid verdict. Read-only: we never send a payment.	Not declared
x402_attest	Signed x402-v2 attestation of a subject/delivery packet: artifact URLs live, sha256 digests match the bound refs, report coherent with evidence.	Not declared
x402_preflight	Preflight-verify a bounty delivery packet before claim/payout (reachability + digest binding + report/evidence coherence) -> signed verdict.	Not declared

Source listings
Source	Listing	First seen	Last seen	Versions
Official MCP Registry	host.beacon.worker.spore-x402/x402-attestation	21 Oct 2026	9 Nov 2026	1