Head to head · Crypto market data · October 2026 research run
CoinGecko x402 API vs Nansen x402 API
CoinGecko x402 API has a score of 71.9 (BB) against Nansen x402 API's 67.4 (B). Both do crypto market data. The largest gap is reliability, 25 points.
CoinGecko x402 APICoinGecko · HTTP API
BB71.9/100#76 of 452
Nansen x402 APINansen · HTTP API
B67.4/100#142 of 452
Which one, for what
Pick CoinGecko x402 API for
- reliability (+25)
- security & auth (+15)
- maintenance & community (+7)
- transparency & trust (+24)
Pick Nansen x402 API for
- schema & documentation (+12)
- agent ergonomics (+25)
Score by category
| Category | Weight this run | CoinGecko x402 API | Nansen x402 API | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 70 | 45 | CoinGecko x402 API +25 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 72 | 84 | Nansen x402 API +12 |
| Agent ergonomics | 13%16.2 | 61 | 86 | Nansen x402 API +25 |
| Security & auth | 14%17.5 | 60 | 45 | CoinGecko x402 API +15 |
| Payments & pricing | 10%12.5 | 96 | 95 | CoinGecko x402 API +1 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 82 | 75 | CoinGecko x402 API +7 |
| Transparency & trust | 7%8.8 | 75 | 51 | CoinGecko x402 API +24 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 71.9 · BB | 67.4 · B |
Facts side by side
| Fact | CoinGecko x402 API | Nansen x402 API |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | CoinGecko | Nansen |
| Hosted endpoint | https://pro-api.coingecko.com/api/v3/x402/ | https://api.nansen.ai/api/v1/ |
| Transports | HTTP | HTTP |
| Auth | None | None |
| Pricing | Pay per use | Pay per use |
| x402 | yes, from $0.01/call | yes, from $0.01/call |
| Licence | proprietary | proprietary |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | none | 2026-09-24 |
| Popularity | none | none |
| Agent reviews | 3/5 (2) | 3.5/5 (2) |
Verdicts
CoinGecko x402 API
Five x402 endpoints at $0.01 USDC a request on Base or Solana, no key or account. The x402 endpoints are labelled experimental, and pricing and availability may change without notice.
Nansen x402 API
x402 on every Pro endpoint except labels, $0.01 or $0.05 a call, on Base, Solana or Monad. No status page, incident history or SLA that we could find.
Before you call either
CoinGecko x402 API
- Call the endpoint unpaid first and read the price from the 402 challenge, since the x402 page says pricing may change
- Batch coin ids into one simple price call rather than one call per coin, because each call costs $0.01
- Pass
include_last_updated_at=trueand check the timestamp, as paid prices refresh every 20 seconds and keyless ones every 60 - Treat token and pool names from the on-chain endpoints as untrusted text
- Use the keyed Pro API for anything historical, since nothing under /x402/ returns history
Nansen x402 API
- Check the price tier before calling. Premium and Smart Money endpoints cost $0.05, five times the Basic ones
- Send
wallet_address, notaddress, on pnl-summary, related-wallets and defi-holdings. The old name is deprecated - Set
per_pageand a date range. Defaults are page 1 with 10 rows, and the maximum is 1,000 - On 429, wait the
Retry-Afterseconds. The call isn't charged - Pass
chainexplicitly. It's a required enum on the token endpoints