Typed judgment

Ask a typed question about any content and get an answer your code can branch on, not prose to parse. Send POST /v1/judge with the required fields state and questions and pay $0.001 per call over x402 or MPP (there is no free tier). It returns the result.

Send state (the content, a string or object) and questions (your own ids mapped to question objects); get back answers keyed by those ids. Three question types: choice (pick one of your named options: returns choice, probabilities per option and confidence), score (a position on levels you describe, lowest first: returns score as a fractional level index, probabilities per level index, confidence and a legend naming each level), and noul (a yes/no: returns noul, the probability of yes from 0 to 1). Up to 8 questions per call, answered in parallel over one piece of state. Use it for routing, triage, classification and gating decisions. Served by jev-latest with gpt-6-luna as fallback (name either first with model); the answer names the model that served, and fallbackFrom when the first was unavailable. Model-backed, not deterministic.

Category: AI & compute · Tags: ai classify judgment routing extraction

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Parameters

Example request

curl -i -X POST https://agent402.tools/v1/judge \
  -H "Content-Type: application/json" \
  -d '{"state":"The export button crashes the settings page in Safari. It works in Chrome, but a few of our customers only use Safari.","questions":{"severity":{"type":"score","instructions":"How severe is the reported issue?","criteria":["Cosmetic; no impact to functionality","Broken or degraded feature, but a workaround exists","Blocking issue; no workaround exists"]},"is_reproducible":{"type":"noul","instructions":"Does this report describe steps that would let an engineer reproduce the problem?"}}}'

Without payment this returns HTTP 402 Payment Required with the exact price for judge; any x402 v2 or MPP client pays it and retries.

Example response

{}

From an MCP client

catalog.call {
  "slug": "judge",
  "params": {
    "state": "The export button crashes the settings page in Safari. It works in Chrome, but a few of our customers only use Safari.",
    "questions": {
      "severity": {
        "type": "score",
        "instructions": "How severe is the reported issue?",
        "criteria": [
          "Cosmetic; no impact to functionality",
          "Broken or degraded feature, but a workaround exists",
          "Blocking issue; no workaround exists"
        ]
      },
      "is_reproducible": {
        "type": "noul",
        "instructions": "Does this report describe steps that would let an engineer reproduce the problem?"
      }
    }
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for judge; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• state and questions are required. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example, so the caller can correct it.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool runs a model, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• Model-backed: the answer is generated by a model, so the same input can produce different wording.
• A GET or HEAD to /v1/judge returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB and a streamed response are not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/v1/judge", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "state": "The export button crashes the settings page in Safari. It works in Chrome, but a few of our customers only use Safari.",
    "questions": {
      "severity": {
        "type": "score",
        "instructions": "How severe is the reported issue?",
        "criteria": [
          "Cosmetic; no impact to functionality",
          "Broken or degraded feature, but a workaround exists",
          "Blocking issue; no workaround exists"
        ]
      },
      "is_reproducible": {
        "type": "noul",
        "instructions": "Does this report describe steps that would let an engineer reproduce the problem?"
      }
    }
  }),
});

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