https://mcp.onchaindiligence.com/x402/preflight-payment
Evaluate a proposed payment against a structured, caller-supplied policy and optional recipient sanctions screening, before execution. Returns ALLOW, REQUIRE_APPROVAL, or BLOCK with reasons, plus a signed OCD PREFLIGHT receipt anyone can independently verify. Policy evaluation only: OCD never holds, moves, or authorizes funds. The wallet, PayBox, or x402 client independently authorizes execution afterward; an ALLOW here does not guarantee it will proceed.
#289
$0.01
5
5
Points earned against points available, biggest lever first.
| Rank | Service | Score | Volume | Price |
|---|---|---|---|---|
| #1 | 68 | 7.0K txns | $0.0010 | |
| #2 | Otto AI−31 | 66 | 3.6K txns | $0.0010 |
| #3 | Bitrefill−28 | 63 | 365 txns | $0.0020 |
| #4 | 63 | 2.5K txns | $0.02 |
| #5 | 62 | 1.1K txns | $0.01 |