fix: protocol handler retries use OAuth-authenticated fetch#150
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Protocol handlers (ATXPAccountHandler, X402, MPP) retry requests using fetchFn from ProtocolConfig. Previously this was the raw fetch, so retries were missing the OAuth Bearer token. MCP servers require both the payment credential header AND the Bearer token. Changed getProtocolConfig() to wrap oauthClient.fetch so retries include the Bearer token from the cached OAuth session. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds integration test that exercises the full ATXPAccountHandler retry path and asserts the retry request includes both X-ATXP-PAYMENT and Authorization: Bearer headers. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Protocol handler retries (ATXPAccountHandler, X402, MPP) were using raw
fetchFnwhich didn't include the OAuth Bearer token. MCP servers require both the payment credential header AND the Bearer token. Retries were getting 401 responses.Changed
getProtocolConfig()to wrapoauthClient.fetchso retries include the Bearer token from the cached OAuth session.Found during E2E testing of Phase 3.9 ATXP pull mode.
Test plan
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