badhttp Chat Completions — Intentionally Misbehaving LLM Endpoint

Name: badhttp Chat Completions — Intentionally Misbehaving LLM Endpoint
Price: 0.002 USD

x402

badhttp Chat Completions — Intentionally Misbehaving LLM Endpoint is a paid API for AI agents from badhttp.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Provides a chat completions endpoint that deliberately misbehaves (slow responses, broken JSON, flaky behavior, x402 paywalls) to test how clients, SDKs, and agents handle HTTP edge cases.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

A stateless catalogue of HTTP edge cases for testing clients, SDKs and agents: slow responses, broken JSON, redirect loops, truncated bodies, flaky endpoints, and x402 paywalls that misbehave.

Output

A JSON chat completion object in OpenAI-compatible format, including an 'x402' field confirming payment (paid status, Base network, 0.002 USD amount, transaction hash), model identifier, token usage counts, and a choices array with an assistant message and finish_reason. The response may intentionally be malformed, truncated, slow, or erroneous depending on the endpoint's misbehavior mode.

Example use cases

SDK retry logic stress test

“Hit the badhttp chat completions endpoint with the message 'hello' and show me every error, delay, or malformed response it throws back — I want to make sure our SDK's retry logic handles all the edge cases correctly.”

x402 paywall integration test

“Run a test call through the badhttp chat completions endpoint and confirm that the x402 payment of 0.002 USDC goes through on Base mainnet and that we get a valid paid response back with a transaction hash.”

Agent resilience validation

“I need to verify our AI agent doesn't crash when it hits a flaky LLM endpoint — can you send a chat message to badhttp's completions API and log exactly how it responds, including any broken JSON or truncated body?”

Technical details

Endpoint

POSThttps://badhttp.dev/v1/chat/completions?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to test client-side resilience, SDK robustness, or agent error-handling against a real HTTP endpoint that intentionally surfaces edge cases — slow responses, broken JSON, redirect loops, truncated bodies, and x402 paywalls. Prefer it over mocking when you want a live, stateless, network-reachable chaos endpoint without standing up your own infrastructure. Especially useful for validating x402 micropayment client implementations end-to-end.

Side effects

Intentionally slow response — endpoint may time out or stall indefinitely to test client timeouts
Broken/malformed JSON — response body may not parse, testing client error handling
Truncated body — response may be cut off mid-stream to test incomplete-response handling
Redirect loops — endpoint may redirect repeatedly, testing client redirect-following limits
Flaky 5xx errors — random server errors to test retry and backoff logic
x402 payment failure — payment may be rejected or paywall may misbehave intentionally
Invalid or missing fields in response — response schema may deviate from OpenAI spec deliberately

Input

Schema · Request body

Field	Type	Description
messages	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "chatcmpl-…",
    "x402": {
      "paid": true,
      "network": "eip155:8453",
      "amount_usd": 0.002,
      "transaction": "0x…"
    },
    "model": "@cf/openai/gpt-oss-20b",
    "usage": {
      "total_tokens": 0,
      "prompt_tokens": 0,
      "completion_tokens": 0
    },
    "object": "chat.completion",
    "choices": [
      {
        "index": 0,
        "message": {
          "role": "assistant",
          "content": "…"
        },
        "finish_reason": "stop"
      }
    ]
  }
}

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How this service works

A stateless catalogue of HTTP edge cases for testing clients, SDKs and agents: slow responses, broken JSON, redirect loops, truncated bodies, flaky endpoints, and x402 paywalls that misbehave.

Output

Example use cases

SDK retry logic stress test

x402 paywall integration test

Agent resilience validation

Technical details

Endpoint

POSThttps://badhttp.dev/v1/chat/completions?utm_source=zero.xyz

When to prefer

Side effects

Intentionally slow response — endpoint may time out or stall indefinitely to test client timeouts
Broken/malformed JSON — response body may not parse, testing client error handling
Truncated body — response may be cut off mid-stream to test incomplete-response handling
Redirect loops — endpoint may redirect repeatedly, testing client redirect-following limits
Flaky 5xx errors — random server errors to test retry and backoff logic
x402 payment failure — payment may be rejected or paywall may misbehave intentionally
Invalid or missing fields in response — response schema may deviate from OpenAI spec deliberately

Input

Schema · Request body

Field	Type	Description
messages	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "chatcmpl-…",
    "x402": {
      "paid": true,
      "network": "eip155:8453",
      "amount_usd": 0.002,
      "transaction": "0x…"
    },
    "model": "@cf/openai/gpt-oss-20b",
    "usage": {
      "total_tokens": 0,
      "prompt_tokens": 0,
      "completion_tokens": 0
    },
    "object": "chat.completion",
    "choices": [
      {
        "index": 0,
        "message": {
          "role": "assistant",
          "content": "…"
        },
        "finish_reason": "stop"
      }
    ]
  }
}