twentyonemillion.art/api/x402/claim

proceed grade A x402 endpoint Base found on x402scan found on CDP Bazaar confidence 1.00
https://twentyonemillion.art/api/x402/claim

As of 2026-08-20, twentyonemillion.art/api/x402/claim on Base held 98.7% uptime across 788 reliability checks over the past 30 days, with only occasional misses. Responses came back sluggish at 1257 ms average from a single EU vantage point (so this includes network distance to the endpoint) and it has held its advertised price steady at $1.00. Its x402-trust grade is A (score 82.0 from a solid sample, tracked for 51 days), so it currently looks safe to use.

Advertised descriptionOne permanent square on twentyone-million, $1 USDC on Base (one per wallet). Want it? Retry this request with a signed payment and the square mints in the response. Pass ?handle= and ?message=. Live: 5 of 21,000 squares claimed, 20,995 open. A novelty collectible — not a token, not an investment.(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
⏱ Cached snapshot, computed 5 hours ago, refreshed at least every 24h. Full-density score from every probe; the paid report adds a live re-probe at decision time, structured risk flags, the component breakdown and settlement proof.
browser wallet, no code · agents: POST /v1/x402-trust / x402_trust_score MCP
30-day uptime
98.7%
Avg latency (EU)
1257 ms
slow · from EU vantage
Confidence
1.00
full-density score
Advertised price
$1
USDC
Price stability
Stable
last 30 days
Probes (30d)
788
full record · up to 48/day

Latency is measured from a single EU vantage point; includes network round-trip distance to the endpoint; a geographically distant endpoint reads slower even when its server is fast, so it is only lightly weighted in the score.

Full observation record ▾
Trust gradeA (score 82.0)
Recommendationproceed
Confidence1.00, full-density (every probe in the 30-day window)
30-day uptime98.7%
Avg latency (EU vantage)1257 ms
Probes (30d)788
Advertised price$1 USDC
Price stability (30d)stable
Networkeip155:8453
First seen2026-06-30
Last probed2026-08-20
Statuslisted
Snapshot computed2026-08-20 06:40 UTC
This is the free cached snapshot. Here's what the paid API adds.
  • ✓
    Live probe at decision time:
    We re-check the endpoint the moment you ask (timestamped) and compute the score from all scores up until this moment, instead of this cached snapshot that may be up to 24h old.
  • ✓
    Confidence band, full component breakdown & structured risk flags:
    Exactly why the score is what it is, machine-readable.
  • ✓
    On-chain settlement proof:
    Real USDC volume & distinct-payer count for the payTo wallet: is anyone actually paying it?
  • ✓
    90-day raw history:
    Every listing/price/payTo change and probe result (via POST /v1/x402-history), up to 90 days back.
  • ✓
    The ranked better-scored alternatives:
    The resource URLs, scores & prices we don't reveal above (via POST /v1/similar), if there are better alternatives available.
  • ✓
    Change & liveness alerts:
    Get notified on payTo/price changes, spec regressions or downtime (via POST /v1/watch-endpoint-30d). Connect up to 10 Discord / Slack webhooks or poll regularly with bearer auth. Increases probe-density to every 5 minutes instead of the usual 30 for the watched endpoint.

... Simply give your agents the tools to do all of that for you, with a simple command
$npx -y x402-trust-mcp

Prefer HTTP? Call POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).