sigtap - Hash a string: sha256, sha512, sha1, md5, CRC32, base64 checksum - crypto hash API for UTF-
https://sigtap-outreach-api.sigtap.workers.dev/tools/hashOverview
x402 USDC on Base - no signup, the wallet is the account. Free check: GET https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/hash returns a 200 sample. Paid call in 3 steps: GET https://sigtap-outreach-api.sigtap.workers.dev/tools/hash -> 402 challenge (payTo+amount) -> sign and retry with the X-PAYMENT header (@x402/fetch does this) -> 200 + settled on-chain. Catalog + MCP twin: GET /llms.txt on this origin.
Protocol
x402
Price
$0.0005
Payment Asset
USDC
Payment Network
Base
Category
tools
Provider
sigtap
Source
self-registered
Indexed
2026-09-05 12:51:48
Health
Status
healthy
Latency (p50)
734ms
Uptime (30d)
88.9%
Reliability Score
84.4/100
Last Checked
2026-09-26 14:25:50
Last Healthy
2026-09-26 14:25:50
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-09-26 14:25:50 | healthy | 402 | 734ms | |
| 2026-09-26 06:28:35 | healthy | 402 | 514ms | |
| 2026-09-26 01:39:57 | healthy | 402 | 479ms | |
| 2026-09-25 16:25:49 | healthy | 402 | 1969ms | |
| 2026-09-25 02:39:39 | error | — | — | fetch failed |
| 2026-09-24 18:18:43 | healthy | 402 | 6051ms | |
| 2026-09-24 06:57:07 | healthy | 402 | 734ms | |
| 2026-09-24 00:45:13 | healthy | 402 | 539ms |