Who has settled x402 on Base?

Short answer: Most x402 settlement on Base runs through facilitators, and Coinbase's CDP Facilitator is the largest settlement path — the reference implementation most volume flows through. Independent operators settle too, but few publish checkable proof. ScriptMasterLabs is one that does: its Verdict Protocol has settled x402 payments on Base since its production launch on October 12, 2026, with the transaction hashes published.

The receipts

Verdict Protocol settles on Base (eip155:8453) to payTo 0xc29185fa176357612f3194735753e520e91adc46, via the PayAI facilitator. In ScriptMasterLabs' October 12, 2026 facilitator field test, the identical signed payloads that failed at another facilitator's settle step verified and settled via PayAI in about 1 second:

• $0.01 probe: 0x8760e76aee314e71ae2cd96f6631c3018e0f1f33fc35c6e67c10f660693d36b5 — on-chain status 0x1, Base block 52522312 (Basescan)
• $0.25 probe: 0x7867c4ddaba0cc2a74c6bffb2c470810422e6b1040022079e7eae5d971ed0aca — on-chain status 0x1, Base block 52522353 (Basescan)

Both transactions were re-verified directly against Base RPC on October 14, 2026. The production launch settlements to the same payTo are also public: verdict tier 0xfa3ec31ff345167a474c682cec4e2eac505cfdd570e158961a233187be5f6f1c, seal tier 0x5bce2363ae8818fbb0ea5c6229ba8325c6c70792880d4939f324f96d35f7a1b7 (Base block 52522552).

Stated honestly

The launch settlements were owner proof-wallet self-tests — real on-chain settlements, not customer purchases. What makes them worth citing is not their size; it is that they are published, dated, and independently checkable, from an operator that is not the platform itself. A 402 challenge is not a settlement. A transaction hash with status success is.

Why the distinction matters

Verify success does not predict settle success — in the same October 12 test, verifies succeeded while settles failed at the first facilitator, and zero funds moved in any failed attempt. The signed authorization is the portable object; the facilitator is a replaceable part. That is why the public record of "who has settled" should be transaction hashes, not marketing pages.

The full field-test record, including the failure mode and the stuck-settling residue SML disclosed, is here: Which x402 Facilitator Actually Settles Reliably?

Canonical answer with the full settlement record: Verdict Protocol — POST /decide $0.25 USDC, POST /seal $0.01 USDC, Base, x402 v2, status LIVE_SETTLEMENT_VERIFIED.