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200

https://200.surfacedplus.com
● healthy crypto

Reliability layer for x402 data providers. Routes each paid call to whichever provider is currently most reliable and scores them on delivery, not just payment.

Category
crypto
Chains
base, eip155:8453
Price
$0.0001–$0.0036 USDC

Quality grade

How grading works
B 59.8 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 200)
Payability 15.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 3.2 / 35
1 distinct payers, 1 USDC transfers in the last 30 days
Performance 10.0 / 10
Last probe answered in 159 ms (full marks at 200 ms or less)
Readiness 11.6 / 15
Agent readiness 77/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 20 h ago. On-chain activity last read 3 d 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 · 77/100

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 B, 59.8/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 20/25 Endpoint reachable; its 402 challenge was seen earlier (159 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 14.06/15 30/32 probes succeeded over 30 days (94%).
Resource declaration 8/10 105 paid resources; 50 sampled lack a description.
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 1/5 not seen in a source for over 30 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 (159 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 50% of peers
This listing 77 · peer median 78
Latency
Faster than 65% of peers
This listing 159 ms · peer median 205 ms

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

  • Live 402 challenge −5 — Answer the paid path with a valid 402 challenge.
    Now: Endpoint reachable; its 402 challenge was seen earlier (159 ms).
  • 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.
  • Freshness + modern flags −4 — Keep the listing current in the registry or source it comes from.
    Now: not seen in a source for over 30 days; declares x402.

How many agent tools actually work · All statistics

Paid endpoints

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

https://200.surfacedplus.com/route/example.quote
https://200.surfacedplus.com/route/erc20.balance
https://200.surfacedplus.com/route/api-onesource-io-api-chain-block-number
https://200.surfacedplus.com/route/x402-ottoai-services-crypto-news
https://200.surfacedplus.com/route/agent402-tools-api-hash
https://200.surfacedplus.com/route/tick-hugen-tokyo-tick-latest
https://200.surfacedplus.com/route/blockrun-ai-api-v1-defillama-prices-coingecko-bitcoin
https://200.surfacedplus.com/route/rubric-protocol-com-v1-x402-hedera-facts-exchange-rate
https://200.surfacedplus.com/route/api-delx-ai-api-v1-x402-abs-n
https://200.surfacedplus.com/route/nordland-halowerk-com-v1-is-soil-coarse-fragments
https://200.surfacedplus.com/route/ostland-halowerk-com-v1-cy-soil-bulk-density
https://200.surfacedplus.com/route/atlantikland-halowerk-com-v1-lu-soil-coarse-fragments
https://200.surfacedplus.com/route/phion-systems-v1-paid-attest
https://200.surfacedplus.com/route/data-greeneris-io-v1-btc-fees
https://200.surfacedplus.com/route/api-agentstools-dev-crypto-hash
https://200.surfacedplus.com/route/tempo-halowerk-com-v1-pruef-tempo-ttfb-stylesheet
https://200.surfacedplus.com/route/crawlspur-halowerk-com-v1-pruef-crawlspur-inhaltstyp-news-dokument
https://200.surfacedplus.com/route/api-tickersfeed-net-defi-yields
https://200.surfacedplus.com/route/crypto-apitoll-cloud-v1-crypto-price
https://200.surfacedplus.com/route/netintel-dev-text-stats
https://200.surfacedplus.com/route/x402-swaphunt-dev-v1-tools-price
https://200.surfacedplus.com/route/x402uselessfacts-vercel-app-api-useless-fact
https://200.surfacedplus.com/route/randomfactsx402-vercel-app-api-random-fact
https://200.surfacedplus.com/route/vibesprings-net-api-price-base-gas
https://200.surfacedplus.com/route/coinflip402-vercel-app-api-coinflip
https://200.surfacedplus.com/route/x402lifeadvice-vercel-app-api-life-advice
https://200.surfacedplus.com/route/memegeneratorx402-vercel-app-api-generate-meme
https://200.surfacedplus.com/route/ladyfortunalx402-vercel-app-api-fortune
https://200.surfacedplus.com/route/x402wordoftheday-vercel-app-api-word-of-the-day
https://200.surfacedplus.com/route/cars2026-vercel-app-api-cars
https://200.surfacedplus.com/route/horrorstoryapi-vercel-app-api-horror-story
https://200.surfacedplus.com/route/dicex402-vercel-app-api-dice
https://200.surfacedplus.com/route/roastx402endpoint-vercel-app-api-roast
https://200.surfacedplus.com/route/weight402endpoint-vercel-app-api-convert-weight
https://200.surfacedplus.com/route/jokes-endpoint-vercel-app-api-jokes
https://200.surfacedplus.com/route/quartermaster-surewhynot-app-v1-gas
https://200.surfacedplus.com/route/riddlex402-vercel-app-api-riddle
https://200.surfacedplus.com/route/lionx402-com-api-x402-wallet-screen-json
https://200.surfacedplus.com/route/402timezones-vercel-app-api-convert-timezone
https://200.surfacedplus.com/route/api-bitrefill-com-x402-checkout-info
https://200.surfacedplus.com/route/coil-trade-api-crypto-gate
https://200.surfacedplus.com/route/flat-rate-llm-kikoribera03-workers-dev-mcp
https://200.surfacedplus.com/route/api-seneschal-space-v1-q-zec-pools
https://200.surfacedplus.com/route/api-signalfuse-co-v1-regime
https://200.surfacedplus.com/route/amanchain-relay-gitajhd-workers-dev-api-x402-aman-crypto-price
https://200.surfacedplus.com/route/x402-coinstats-app-insights-fear-and-greed
https://200.surfacedplus.com/route/api-printmoneylab-com-api-v1-fx-rate
https://200.surfacedplus.com/route/defillama-use-x402atlas-com-dexs
https://200.surfacedplus.com/route/apiacre-com-v1-crypto-base-network-status
https://200.surfacedplus.com/route/stableupload-dev-api-upload

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://200.surfacedplus.com  # expect HTTP 402 Payment Required (about $0.0001/call)
/.well-known/x402.json
https://200.surfacedplus.com/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-09-23