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Head to head

x402 Preflight vs MCP

Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.

x402 Preflightio.github.chico10117/x402-preflight
B
No reviews yet

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

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MCPcom.decionis/mcp
A
No reviews yet

Authorize consequential AI agent actions before execution

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The short version

Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. The safety scan favours MCP (99/100 against 81). MCP has noticeably more public adoption.

 x402 PreflightMCP
User ratingNo reviews yetNo reviews yet
Safety gradeB81/100A99/100
AdoptionNewEstablished
GitHub stars0533
Downloads / week–297
Runs whereHosted (remote)Hosted (remote)
Gateway-readyYesYes
Tools3—
Write actions2—
Price per callFreeFree
Licence—Apache-2.0
Last release2026-09-152026-09-19
CategoryAI and agentsAI and agents

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