402rpc
402rpc.com
Ethereum mainnet JSON-RPC paid per request in USDC on Base over x402, plus simple price, balance and gas endpoints. Current state only (not an archive node). No account or key.
USDCBasePolygonArbitrum
stampthisfile
stampthisfile.com
Own this tool? Claim this listing free
Timestamp a file's SHA-256 hash in Bitcoin with OpenTimestamps; the file never leaves your device. Pay per hash in USDC on Base via x402, no account.
Crypto payment details
- Payment protocol
- x402
- Networks
- Base
- Tokens
- USDC
- Price per call (our 402 probe)
- $0.05 per call (check the provider for current pricing)
- Example paid endpoint
https://stampthisfile.com/v1/stamps- Paid endpoint check
- Checked 2026-11-06 · pass (technical check, not an endorsement)
- Also listed on
- Agentic.Market, public listing
- More tools on
- Base
Public statsmeasured by YourAITools
Measuring since Nov 6, 2026: 4 daily checks so far, so these numbers are still thin.
- Status at last check
- Up
- Answered below HTTP 500
- Measuring since
- Nov 6, 2026
- Last check
- Nov 9, 2026, 11:10 AM ET
- HTTP status
- 402
- Valid x402 payment terms
- Yes
- x402 version
- v2
- Response time
- 310 ms
- Time to response headers
- Listed price
- $0.05
- Price seen in the 402
- $0.05 on Base
- Inside the listed price range
- Uptime, last 7 days
- 100%
- 4 of 4 daily checks up · valid x402 100%
- Uptime, last 30 days
- 100%
- 4 of 4 daily checks up · valid x402 100%
Trust score: not scored yet (fewer than 7 days of data). A score appears after at least 7 days and 6 daily checks.
How we measure: one unpaid check per day of the listing’s example endpoint (POST https://stampthisfile.com/v1/stamps). We never pay and never send a payment header. Up means any answer below HTTP 500 except 404/410 within 8 seconds. Uptime counts those daily checks. Payment never changes these numbers. A technical check, not an endorsement. Raw JSON · schema
How we verified it
Unpaid POST /v1/stamps returned HTTP 402 on 2026-11-06 with x402 payment terms: x402 v2, exact, 0.05 USDC on Base. Price checked via our 402 probe on 2026-11-06 (1 route probed; other routes may be priced differently). Official site fetched (HTTP 200) on 2026-11-06. Shown on the public Agentic.Market site. Last checked 2026-11-06.
The description summarizes the provider's own site. YourAITools is not affiliated with stampthisfile. Listing a tool is not an endorsement: check pricing and terms with the provider before paying.
Some links are affiliate links; we may earn a commission at no cost to you. It never affects listings or order. How we make money
Is this your tool? Update the listing for free, or get it Featured for 30 days ($29, card or USDC): a badge and a labeled slot at the top of its category. Check your x402 endpoint free.
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