Conformance docs/EVIDENCE.md is canonical

Stock clients, unmodified.

Conformance is tested by pointing unmodified stock x402 clients at walras — on the reasoning that a facilitator that needs a special client isn't one. Every check below maps to a dated, on-chain-verifiable transcript in docs/EVIDENCE.md.

01Summary

2026-08-14

Latest evidence

17fc989

Pinned x402 spec

exact

Scheme

stellar:testnet

Network

Pass

9 / 9 checks

02Checks

Unpaid request returns 402 with machine-readable terms @x402/fetch 2.20.0 S2-2 → Pass

Stock client completes 402 → pay → settle, on-chain (tx ac50c091…cc155) @x402/fetch 2.20.0 S2-3 → Pass

x402 repo e2e suite passes against walras (4 / 4: fetch × express, hono; axios) x402 e2e @ 17fc989 S2-4 → Pass

A replayed payload is rejected at settle, with a non-null reason @x402/core 2.20.0 S2-6 → Pass

An amount-mismatch payload is rejected at verify (pre-simulation) @x402/core 2.20.0 S2-6 → Pass

An expired auth entry is rejected on re-simulation @x402/core 2.20.0 S2-6 → Pass

Forged listing metadata is soft-dropped at the trust boundary; settlement untouched hostile client S3-4 → Pass

An MCP agent completes discover → pay using only two tools @modelcontextprotocol/sdk S6-3 → Pass

A real production tool is paid by an agent with zero prior integration (Policywright) MCP agent S6-4 → Pass

03Sessions

2026-08-14 walras 55b150b Policywright — a real production tool paid by a zero-integration agent Pass

2026-08-05 walras ba8b5cb MCP discover → pay with search_resources + paid_call Pass

2026-08-02 walras c58c983 Stock-client round-trip + x402 e2e suite (4 / 4) + negative live tests Pass

Dual-baseline transcripts live in-repo — walras is diffed against the public x402.org Stellar facilitator (EVIDENCE §S2-5). Every result above maps to a replayable transcript in docs/EVIDENCE.md. The chain is canonical.

Read EVIDENCE.md Open the ledger