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SPORE x402 DNS Preflight (stable host)

https://spore-x402-d.spore-x402.workers.dev/
● healthy general

DNS MX TXT A records domain lookup with an email-deliverability verdict: A records, MX hosts, SPF (v=spf1), DMARC policy and CAA in one call, plus a signed ok/warn/fail verdict. DNS-over-HTTPS, read-only, no keys. Pay-per-call over x402, 0.01 USDC on Base (10000 atomic, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, payTo 0xDb4689c163b17C461543Ce614c1971A1537e7680). A standard x402 client that

Category
general
Chains
base
Price
$0.0100 USDC / call

Quality grade

How grading works
C+ 52.0 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 10.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✗ Payment address on record
  • ✗ Settlement network declared
  • ✗ Price declared
Demand 0.0 / 35
No payment address on record, so demand cannot be measured
Performance 10.0 / 10
Last probe answered in 111 ms (full marks at 200 ms or less)
Readiness 12.0 / 15
Agent readiness 80/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 20 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

B · 80/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 52.0/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 0/10 No payment requirements on record.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (111 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 23/23 probes succeeded over 30 days (100%).
Resource declaration 10/10 Declares 6 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (111 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 55% of peers
This listing 80 · peer median 78
Latency
Faster than 83% of peers
This listing 111 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Valid payment requirements −10 — Return complete payment requirements in the 402 challenge.
    Now: No payment requirements on record.
  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.

How many agent tools actually work · All statistics

Paid endpoints

6 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/attest

Signed x402-v2 attestation of a bounty delivery packet: artifact URLs live, sha256 digests match the bound refs, report coherent with evidence. HMAC-SHA256 signed verdict on Base.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/preflight

Verify a bounty delivery packet before claim/payout.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/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.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/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.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/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.

GET,POST https://spore-x402-d.spore-x402.workers.dev/x402/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-know

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://spore-x402-d.spore-x402.workers.dev/  # expect HTTP 402 Payment Required (about $0.01/call)
/.well-known/x402.json
https://spore-x402-d.spore-x402.workers.dev/.well-known/x402

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nohumans since 2026-10-22