[BUG] http_request / webhook_request report a successful HTTP 200 as failed when the JSON body has top-level status and data keys #9838

Describe the bug

http_request (the API block's tool) and webhook_request report a successful HTTP 200 as failed when the JSON response body has both a top-level status and a top-level data key, for example the common {"status":"success","data":{...}} shape. The request has already been sent and the remote side has handled it, but the API block throws and an Agent block is told the tool failed.

The cause looks like a leftover branch for the old /api/proxy route. In transformResponse it checks the shape of the third-party body instead of the HTTP response: tools/http/request.ts#L197-L214, same code in tools/http/webhook_request.ts#L88-L103. For such a body it returns success: data.success (undefined when the body has no success key), output.status = the body's string ("success") instead of 200, and headers: {} instead of the real response headers. The route it was written for is no longer in the repo: apps/sim/app/api/ has no proxy directory, and tools/index.test.ts#L4810-L4813 asserts tools never call /api/proxy. In apps/sim the only other mention of it is the comment at request.ts#L197.

Downstream, two places treat !success as a failure:

• API block: executor/handlers/api/handler.ts#L81 throws HTTP Request failed: ... | Status: success. The docs say only non-2xx responses, network failures and timeouts fail the block (api.mdx#L59).
• Agent block: the provider loop sends the model {"error":true,"message":"Tool execution failed","tool":"http_request"}, for example providers/groq/index.ts#L484-L488. I did not read every provider, only Groq and the OpenAI core, which map it the same way.

So after a POST that really went through (an order, a refund, a ticket), the agent is told it failed and may retry it or tell the user it failed, and a workflow's error branch may run for something that succeeded.

To Reproduce

No server, no model, no network. After bun install --ignore-scripts --frozen-lockfile, put this file at apps/sim/tools/http/jsend.test.ts and run bunx vitest run tools/http/jsend.test.ts from apps/sim:

import { describe, expect, it } from 'vitest'
import { requestTool } from '@/tools/http/request'
import { webhookRequestTool } from '@/tools/http/webhook_request'

const make = (body: unknown) =>
  new Response(JSON.stringify(body), {
    status: 200,
    headers: { 'content-type': 'application/json', 'x-request-id': 'req-123' },
  })

describe('200 JSON body with top-level status + data', () => {
  for (const [name, tool] of [['http_request', requestTool], ['webhook_request', webhookRequestTool]] as const) {
    it(`${name}: JSend body`, async () => {
      const r: any = await tool.transformResponse!(make({ status: 'success', data: { orderId: 'A-1001' } }))
      console.log(name, JSON.stringify(r))
      expect(r.success).toBe(true)
      expect(r.output.status).toBe(200)
      expect(r.output.headers['x-request-id']).toBe('req-123')
    })
  }
  it('control: same 200 without the two keys', async () => {
    const r: any = await requestTool.transformResponse!(make({ orderId: 'A-1001' }))
    expect(r.success).toBe(true)
  })
})

Expected behavior

success: true, output.status = 200, and the real response headers, as in the control case.

Actual behavior

The two JSend tests fail with expected undefined to be true. The logged result for both tools is:

{"output":{"data":{"orderId":"A-1001"},"status":"success","headers":{}}}

The control (same 200, body without status/data) returns success: true, status: 200 and the headers.

I also ran the whole path once, offline: a small node:http server on 127.0.0.1 answering 200 with {"status":"success","data":{...}}, the repo's real executeTool, ApiBlockHandler and Groq provider loop, with only the DNS check and the pinned-IP fetch replaced to connect to that server, and a scripted stand-in for the model (no key, no real model). The server received the POST. executeTool returned success: undefined, the API block threw ... Status: success, and the model's tool message was {"error":true,"message":"Tool execution failed","tool":"http_request"}. The existing tools/http/request.test.ts does not catch this; I did not check why, but its ToolTester helper may be setting success itself (not verified).

Suggested fix

Delete the proxy branch from both request.ts and webhook_request.ts, so the "Direct response handling" path always applies. I did that locally: the test above passes, the full-path run above returns success=true with status: 200 and the real headers, and bunx vitest run tools/http executor/handlers/api providers/groq tools/index.test.ts gives 4 test files, 274 tests passed. If some caller outside apps/sim still relies on the branch (I only searched apps/sim for api/proxy), it could key on an explicit marker set by Sim rather than on the shape of a third-party body. A regression test through executeTool would be better than one through ToolTester.

Additional context

Did not test: any real model or provider, other providers' tool loops beyond Groq and OpenAI core, or the MCP and custom-tool paths. A body that also has success: true is not reported as failed, but it still loses the real status and headers (read from the code only, not run).

Environment: simstudioai/sim at 031ba61 (main, 2026-11-10; the files above are identical to the v0.9.48 commit 360c86a), bun 1.3.14, Node 20.18.0, macOS (arm64).

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