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fix(python): snapshot MCP 402 accepts before enrichers - #24
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Scheme enrichers mutate Extra in place. Passing live wrapper accepts into a corrective 402 poisons the match baseline so recovery retries fail. Snapshot first, matching Go x402-foundation#3482. Co-authored-by: phdargen <phdargen@users.noreply.github.com>
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Port of x402-foundation#3482 (MCP accept snapshot) from Go to Python SDK.
Go MCP snapshots
config.Acceptsbefore scheme enrichers build a corrective 402 so in-place Extra writes (for example batch-settlementchannelState) do not poison the wrapper match baseline. Python_create_payment_required_result*still passed live accepts through, so a recovery retry could fail to match. This PR snapshots accepts in the FastMCP, async, and sync helpers with the existingsnapshot_payment_requirements_list. Tracking: x402-foundation#3493 (accept-snapshot slice only; does not close the issue).AI disclosure: Automated by @phdargen. Use your own judgement