Claude Code scheduled routines fail every MCP tool call with requires approval error

What this error means

Streamable HTTP error: Error POSTing to endpoint: MCP tool call requires approval is a Claude Code failure pattern reported for developers trying to fix scheduled routines + custom mcp connectors breaking since ~2026-05-20 regression where unattended routine executions require human approval. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

GitHub issue #61015 opened May 21 2026 — massive community impact confirmed with multiple users reporting same regression affecting first-party Notion connector and custom OAuth MCPs. Routines fire but all tool calls silently fail. UI guarantees no approval needed. P0 regression, very high commercial value. Mapping correct per table rules.

Common causes

• GitHub issue #61015 opened May 21 2026 — massive community impact confirmed with multiple users reporting same regression affecting first-party Notion connector and custom OAuth MCPs. Routines fire but all tool calls silently fail. UI guarantees no approval needed. P0 regression, very high commercial value. Mapping correct per table rules.

Quick fixes

1. Confirm the exact error signature matches Streamable HTTP error: Error POSTing to endpoint: MCP tool call requires approval.
2. Check the Claude Code account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/anthropics/claude-code/issues/61015

Evidence note: GitHub issue #61015 opened May 21 2026 — massive community impact confirmed with multiple users reporting same regression affecting first-party Notion connector and custom OAuth MCPs. Routines fire but all tool calls silently fail. UI guarantees no approval needed. P0 regression, very high commercial value. Mapping correct per table rules.

Related errors

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FAQ

What should I check first?

Start with the exact Streamable HTTP error: Error POSTing to endpoint: MCP tool call requires approval text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed Claude Code workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without Streamable HTTP error: Error POSTing to endpoint: MCP tool call requires approval.