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santyvv-data — pay-per-call data API (x402)

https://x402.santyvv.com/api/chain/balance
● healthy crypto

Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.

Category
crypto
Chains
base
Price
$0.0100 USDC / call

Quality grade

How grading works
B 64.8 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
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 9.0 / 35
7 distinct payers, 148 USDC transfers in the last 30 days; the wallet is shared by 3 listings, so each is credited 1/3; discounted because most transfers come from few payers
Performance 6.8 / 10
Last probe answered in 780 ms (full marks at 200 ms or less)
Readiness 14.0 / 15
Agent readiness 94/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 18 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

A · 90/100

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, 64.8/100), 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 25/25 Paid endpoint answers with an HTTP 402 challenge (780 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 14.53/15 31/32 probes succeeded over 30 days (97%).
Resource declaration 8/10 41 paid resources; 41 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 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 (780 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 89% of peers
This listing 90 · peer median 78
Latency
Faster than 9% of peers
This listing 780 ms · peer median 205 ms

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

  • 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.
  • Resource declaration −2 — Declare each paid resource with its input and output schema.
    Now: 41 paid resources; 41 sampled lack a description.

How many agent tools actually work · All statistics

Paid endpoints

41 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://x402.santyvv.com/api/crypto/price
https://x402.santyvv.com/api/crypto/token-price
https://x402.santyvv.com/api/crypto/token-price-historical
https://x402.santyvv.com/api/crypto/coin-price
https://x402.santyvv.com/api/crypto/markets
https://x402.santyvv.com/api/crypto/history
https://x402.santyvv.com/api/crypto/ohlc
https://x402.santyvv.com/api/crypto/trending
https://x402.santyvv.com/api/crypto/global
https://x402.santyvv.com/api/crypto/tickers
https://x402.santyvv.com/api/crypto/klines
https://x402.santyvv.com/api/crypto/orderbook
https://x402.santyvv.com/api/execution/check
https://x402.santyvv.com/api/crypto/exchange-rates
https://x402.santyvv.com/api/crypto/search
https://x402.santyvv.com/api/defi/chains
https://x402.santyvv.com/api/defi/chain-history
https://x402.santyvv.com/api/defi/protocol-tvl
https://x402.santyvv.com/api/defi/stablecoins
https://x402.santyvv.com/api/defi/stablecoin-chains
https://x402.santyvv.com/api/defi/dex-volume
https://x402.santyvv.com/api/defi/fees
https://x402.santyvv.com/api/defi/protocol-fees
https://x402.santyvv.com/api/defi/protocol-volume
https://x402.santyvv.com/api/defi/tvl-history
https://x402.santyvv.com/api/defi/yield-pool
https://x402.santyvv.com/api/chain/info
https://x402.santyvv.com/api/chain/block
https://x402.santyvv.com/api/chain/gas
https://x402.santyvv.com/api/chain/balance
https://x402.santyvv.com/api/chain/token-balance
https://x402.santyvv.com/api/chain/token-info
https://x402.santyvv.com/api/chain/transaction
https://x402.santyvv.com/api/chain/receipt
https://x402.santyvv.com/api/chain/nonce
https://x402.santyvv.com/api/chain/code
https://x402.santyvv.com/api/chain/logs
https://x402.santyvv.com/api/chain/call
https://x402.santyvv.com/api/chain/rpc
https://x402.santyvv.com/api/fx/rates
https://x402.santyvv.com/api/fx/convert

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://x402.santyvv.com/api/chain/balance  # expect HTTP 402 Payment Required (about 0.01 USDC/call)
/.well-known/x402.json
https://x402.santyvv.com/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-09-21