Head to head
Blackwall X402 Guardrail vs POPCORN MCP
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
No reviews yet
Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.
Full listing
No reviews yet
Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
Full listingThe short version
Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. Both score close on the safety scan (87 and 80 out of 100). Blackwall X402 Guardrail is hosted and callable through the gateway; POPCORN MCP runs on your own machine.
| Blackwall X402 Guardrail | POPCORN MCP | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | A87/100 | B80/100 |
| Adoption | Growing | Growing |
| GitHub stars | 0 | 0 |
| Downloads / week | – | 208 |
| Runs where | Hosted (remote) | Your machine (local) |
| Gateway-ready | Yes | No |
| Tools | 1 | 6 |
| Write actions | — | — |
| Price per call | Free | Free |
| Licence | — | NOASSERTION |
| Last release | 2026-08-25 | 2026-09-19 |
| Category | Finance | Finance |