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CoinOps Select - Paid Research + Tooling API

https://coinop.publicvm.com/api/v1/market/defi-summary
● healthy crypto

x402 paid API with 7 endpoints: smart-contract risk scanner, flash-loan arbitrage scanner, MEV-share bundle preview, job escrow lifecycle, stateless research queries, signals feed, catalog

Category
crypto
Chains
base
Price
$0.0050 USDC / call

Quality grade

How grading works
C+ 52.1 / 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 0.0 / 35
0 distinct payers, 0 USDC transfers in the last 30 days
Performance 4.0 / 10
Last probe answered in 1283 ms (full marks at 200 ms or less)
Readiness 13.1 / 15
Agent readiness 87/100
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

B · 87/100

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+, 52.1/100), 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 (1283 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 14.4/15 24/25 probes succeeded over 30 days (96%).
Resource declaration 8/10 56 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 3/5 seen within 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 (1283 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 77% of peers
This listing 87 · peer median 78
Latency
Faster than 5% of peers
This listing 1,283 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: 56 paid resources; 50 sampled lack a description.
  • Freshness + modern flags −2 — Keep the listing current in the registry or source it comes from.
    Now: seen within 30 days; declares x402.

How many agent tools actually work · All statistics

Adoption signals

Public signals from outside this directory, shown for context. They do not change search order or grades.

Site rank (Tranco)
#35,949 of the top 1M
publicvm.com · list of 2026-11-10

Paid endpoints

56 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://coinop.publicvm.com/api/v1/ping
https://coinop.publicvm.com/api/v1/market/perp-preflight
https://coinop.publicvm.com/api/v1/market/perp-preflight/batch
https://coinop.publicvm.com/api/v1/market/perp-funding
https://coinop.publicvm.com/api/v1/market/perp-funding/batch
https://coinop.publicvm.com/api/v1/market/defi-summary
https://coinop.publicvm.com/api/v1/market/gas
https://coinop.publicvm.com/api/v1/research/latest
https://coinop.publicvm.com/api/v1/research/search
https://coinop.publicvm.com/api/v1/audit/vulnerability-scan
https://coinop.publicvm.com/api/v1/query/token-safety
https://coinop.publicvm.com/api/v1/query/wallet-risk
https://coinop.publicvm.com/api/v1/query/contract-permissions
https://coinop.publicvm.com/api/v1/chain/token-safety
https://coinop.publicvm.com/api/v1/chain/wallet-risk
https://coinop.publicvm.com/api/v1/chain/contract-permissions
https://coinop.publicvm.com/api/v1/chain/token-safety/batch
https://coinop.publicvm.com/api/v1/chain/wallet-risk/batch
https://coinop.publicvm.com/api/v1/chain/contract-permissions/batch
https://coinop.publicvm.com/api/v1/query/token-safety/batch
https://coinop.publicvm.com/api/v1/query/wallet-risk/batch
https://coinop.publicvm.com/api/v1/query/contract-permissions/batch
https://coinop.publicvm.com/api/v1/proof/hash
https://coinop.publicvm.com/api/v1/proof/merkle-verify
https://coinop.publicvm.com/api/v1/proof/commit
https://coinop.publicvm.com/api/v1/attestation/build
https://coinop.publicvm.com/api/v1/attestation/verify
https://coinop.publicvm.com/api/v1/code/complexity
https://coinop.publicvm.com/api/v1/code/refactor-suggest
https://coinop.publicvm.com/api/v1/escrow/commitment
https://coinop.publicvm.com/api/v1/escrow/transition
https://coinop.publicvm.com/api/v1/staking/list
https://coinop.publicvm.com/api/v1/vaults/alerts
https://coinop.publicvm.com/api/v1/intent/quote
https://coinop.publicvm.com/api/v1/intent/surplus
https://coinop.publicvm.com/api/v1/treasury/stack
https://coinop.publicvm.com/api/v1/treasury/yield-policy
https://coinop.publicvm.com/api/v1/treasury/runway
https://coinop.publicvm.com/api/v1/compliance/jurisdiction
https://coinop.publicvm.com/api/v1/mev/analyze
https://coinop.publicvm.com/api/v1/sentiment/score
https://coinop.publicvm.com/api/v1/sentiment/aggregate
https://coinop.publicvm.com/api/v1/cover/quote
https://coinop.publicvm.com/api/v1/compute/estimate
https://coinop.publicvm.com/api/v1/compute/cheapest
https://coinop.publicvm.com/api/v1/compute/arbitrage
https://coinop.publicvm.com/api/v1/dataset/curate
https://coinop.publicvm.com/api/v1/subscription/flow
https://coinop.publicvm.com/api/v1/batch/net
https://coinop.publicvm.com/api/v1/merkle/leaf

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://coinop.publicvm.com/api/v1/market/defi-summary  # expect HTTP 402 Payment Required (about 0.005 USDC/call)
/.well-known/x402.json
https://coinop.publicvm.com/.well-known/x402

Listed in

Directories this entry was found in.

submission since 2026-10-19 x402scan since 2026-10-20