AI Inference · x402 · early usage

Verify one legal citation

by veridictum.legal · discovered, not yet claimed by its owner · updated 2026-09-29

30d calls2

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Verify one legal citation. Body: {"citation": "<string>"} - full ("Miranda v. Arizona, 384 U.S. 436 (1966)") or bare ("384 U.S. 436"); the case name enables mismatch detection. Deterministic: regex plus cache / local corpus / CourtListener, no LLM in the path. status=verified (name confirmed), suspicious (reporter resolves to a DIFFERENT case - the fabrication signature), or not_found. verified=false is a finding, not an error: do not retry. Only verified results are cached.

Tags: legal · citations · verification · hallucination-detection · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-09-29

Input example from Bazaar metadata

{
  "citation": "Miranda v. Arizona, 384 U.S. 436 (1966)"
}

Output example

{
  "api_call_made": false,
  "cached": true,
  "case_name": "Miranda v. Arizona",
  "citation": "Miranda v. Arizona, 384 U.S. 436 (1966)",
  "confidence": "high",
  "court": "Supreme Court of the United States",
  "courtlistener_id": "107252",
  "courtlistener_url": "https://www.courtlistener.com/opinion/107252/miranda-v-arizona/",
  "date_filed": "1966-06-13",
  "message": "Citation verified",
  "name_match": "confirmed",
  "source": "local_corpus",
  "status": "verified",
  "tier": 1,
  "verified": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/37866.json for the price and payment options.
Pay. Call GET https://veridictum.legal/api/v1/agent/verify. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0xb1df90631E2e27C2eA755F91c050732850739E1c	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01	i1vkcsuxLTSSBY7ng3sg3SpCk5JfMZpDqhsqGMq6vn9	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb1df90631E2e27C2eA755F91c050732850739E1c",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "i1vkcsuxLTSSBY7ng3sg3SpCk5JfMZpDqhsqGMq6vn9",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "api_call_made": {
          "type": "boolean"
        },
        "cached": {
          "description": "Only verified results are ever cached; suspicious and not_found answers are re-checked on every call.",
          "type": "boolean"
        },
        "case_name": {
          "type": [
            "string",
            "null"
          ]
        },
        "citation": {
          "description": "The citation exactly as submitted, echoed back.",
          "type": "string"
        },
        "confidence": {
          "type": "string"
        },
        "court": {
          "type": [
            "string",
            "null"
          ]
        },
        "courtlistener_id": {
          "type": [
            "string",
            "null"
          ]
        },
        "courtlistener_url": {
          "description": "Full opinion on CourtListener. Never truncate it.",
          "type": [
            "string",
            "null"
          ]
        },
        "date_filed": {
          "description": "ISO 8601 date.",
          "type": [
            "string",
            "null"
          ]
        },
        "message": {
          "type": [
            "string",
            "null"
          ]
        },
        "name_match": {
          "description": "confirmed: the submitted name matches the case found. mismatch: a DIFFERENT case. not_checked: a bare citation carried no name to check.",
          "enum": [
            "confirmed",
            "mismatch",
            "not_checked",
            null
          ],
          "type": [
            "string",
            "null"
          ]
        },
        "source": {
          "description": "Which lookup tier answered.",
          "type": [
            "string",
            "null"
          ]
        },
        "status": {
          "description": "verified: resolves to a real case and any submitted name matched. suspicious: the volume/reporter/page resolves but to a DIFFERENT case than the name given - the signature of a fabricated citation. not_found: no case matches.",
          "enum": [
            "verified",
            "suspicious",
            "not_found"
          ],
          "type": "string"
        },
        "tier": {
          "description": "Importance: 1=landmark, 2=highly cited, 3=standard.",
          "type": [
            "integer",
            "null"
          ]
        },
        "verified": {
          "description": "True only for status=verified. False is a finding, not an error.",
          "type": "boolean"
        }
      },
      "required": [
        "citation",
        "status",
        "verified"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "api_call_made": true,
    "cached": true,
    "case_name": "string",
    "citation": "string",
    "confidence": "string",
    "court": "string",
    "courtlistener_id": "string",
    "courtlistener_url": "string",
    "date_filed": "string",
    "message": "string",
    "name_match": "confirmed",
    "source": "string",
    "status": "verified",
    "tier": 0,
    "verified": true
  },
  "type": "string"
}

Examples

curl

curl "https://veridictum.legal/api/v1/agent/verify"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://veridictum.legal/api/v1/agent/verify");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://veridictum.legal/api/v1/agent/verify")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: veridictum.legal
Endpoint: https://veridictum.legal/api/v1/agent/verify
Machine-readable: /resources/37866.json