Check agent output before you accept or pay for a deliverable

Check agent output before you accept or pay for a deliverable: your JSON Schema plus rules like totals matching and unique IDs. Pass/fail, % of checks passed, fix hints and a signed receipt. $0.02 USDC, no signup, x402 v2.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://fastapi-service-5ag4.onrender.com/verify/deliverable

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "agent_id": "example-agent-001",
    "enforce_rules": true,
    "expected_schema": {
      "properties": {
        "findings": {
          "items": {
            "properties": {
              "id": {
                "type": "string"
              },
              "summary": {
                "minLength": 1,
                "type": "string"
              }
            },
            "required": [
              "id",
              "summary"
            ],
            "type": "object"
          },
          "minItems": 1,
          "type": "array"
        },
        "report_title": {
          "minLength": 1,
          "type": "string"
        }
      },
      "required": [
        "report_title",
        "findings"
      ],
      "type": "object"
    },
    "rules": [
      {
        "field": "findings[].id",
        "type": "unique"
      }
    ],
    "submitted_output": {
      "findings": [
        {
          "id": "F-1",
          "summary": "Vendor A raised its entry plan by 10%."
        },
        {
          "id": "F-2",
          "summary": "Vendor B added a free tier."
        }
      ],
      "report_title": "Q3 competitor pricing scan"
    },
    "task_id": "example-task-002"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "agent_id": {
              "anyOf": [
                {
                  "maxLength": 200,
                  "minLength": 1,
                  "pattern": "^[^\\x00-\\x1f\\x7f]+$",
                  "type": "string"
                },
                {
                  "type": "null"
                }
              ],
              "default": null,
              "description": "Optional label identifying the agent that produced submitted_output (for example, the seller), used for /reputation and the trust score: records and scores belong to the producer, not to whoever calls this endpoint. It is an unauthenticated label. agent_ids starting with 'test-' are reserved for testing: the verification runs normally but is never recorded, so it cannot affect any reputation or trust score. 1-200 printable characters (same rule as GET /score/{agent_id}); a longer or malformed value is rejected (422), not truncated.",
              "title": "Agent Id"
            },
            "bounds": {
              "anyOf": [
                {
                  "additionalProperties": {
                    "description": "Optional inclusive min/max for one field. Numbers, or ISO-8601 date /\ndatetime strings (compared as datetimes; naive values are treated as UTC).",
                    "properties": {
                      "if_present": {
                        "default": false,
                        "description": "Optional. When true, the check is skipped where this field is absent (the whole path, or an element of an array it applies to) instead of being reported as unable to run: no flag, and enforce_rules does not fail on it. When false (default) an absent field is a flag, and a failure under enforce_rules.",
                        "title": "If Present",
                        "type": "boolean"
                      },
                      "max": {
                        "anyOf": [
                          {
                            "type": "integer"
                          },
                          {
                            "type": "number"
                          },
                          {
                            "type": "string"
                          },
                          {
                            "type": "null"
                          }
                        ],
                        "default": null,
                        "title": "Max"
                      },
                      "min": {
                        "anyOf": [
                          {
                            "type": "integer"
                          },
                          {
                            "type": "number"
                          },
                          {
                            "type": "string"
                          },
                          {
                            "type": "null"
                          }
                        ],
                        "default": null,
                        "title": "Min"
                      }
                    },
                    "title": "Bound",
                    "type": "object"
                  },
                  "maxProperties": 50,
                  "type": "object"
                },
                {
                  "type": "null"
                }
              ],
              "default": null,
              "description": "Optional per-field min/max, keyed by dotted path with '[]' array wildcard (e.g. 'items[].price'). Numbers or ISO-8601 dates. Violations are reported as informational flags unless enforce_rules is true.",
              "title": "Bounds"
            },
            "detail": {
              "default": "full",
              "description": "'full' (default) returns everything; 'compact' returns only the summary, next actions, receipt and signature. Use compact inside verify-repair loops to save tokens. 'compact' fields: summary, next_actions, result, the receipt fields (verification_id, task_id, agent_id, output_hash, schema_hash, rules_hash, verified_at, verifier_version, enforce_rules, strict_content_check), verify and attestation - errors, errors_detail, flags, hints and the scores are left out entirely, not just emptied. Both shapes are fully signed.",
              "enum": [
                "full",
                "compact"
              ],
              "title": "Detail",
              "type": "string"
            },
            "enforce_rules": {
              "default": false,
              "description": "Opt-in. When true, every configured bound and consistency rule must hold, or the result is 'fail' (like strict_content_check), with an 'enforce_rules: ...' entry in errors. That includes a rule or bound that cannot run (its path is missing, a value is not comparable, a value has nothing to be compared against): it fails rather than passing silently, so omitting a field, in the whole path or in any array element the rule applies to, cannot skip a binding rule. A rule or bound with if_present: true is skipped where its field is absent instead. When false (default) nothing changes: violations and unrunnable rules stay informational flags. Echoed back in the signed response.",
              "title": "Enforce Rules",
              "type": "boolean"
            },
            "expected_schema": {
              "additionalProperties": true,
              "title": "Expected Schema",
              "type": "object"
            },
            "rules": {
              "anyOf": [
                {
                  "items": {
                    "description": "One caller-supplied cross-field rule. Paths use dotted keys with '[]'\nas an array wildcard, e.g. 'items[].price' or 'order.total'.\n\n  sum_equals: sum of `field` values == `equals_field` v

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