Free during launch

Free during launch: check AI agent output before you accept or pay for a deliverable against your JSON Schema and rules. Pass/fail, % of checks passed, fix hints, signed attestation and receipt. $0.02 USDC after, 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://verify.sarnai.dev/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": {
              "description": "Optional label identifying the AI 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\u2026",
              "type": [
                "string",
                "null"
              ]
            },
            "bounds": {
              "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.",
              "type": [
                "object",
                "null"
              ]
            },
            "detail": {
              "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_de\u2026",
              "enum": [
                "full",
                "compact"
              ],
              "type": "string"
            },
            "enforce_rules": {
              "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\u2026",
              "type": "boolean"
            },
            "expected_schema": {
              "description": "Required. The JSON Schema (draft-04 to 2020-12) that submitted_output must satisfy: your own requirements, as a JSON object.",
              "type": "object"
            },
            "rules": {
              "description": "Optional cross-field rules: sum_equals, gte, lte, exists_in, unique (duplicate detection). Violations are reported as informational flags unless enforce_rules is true.",
              "items": {
                "properties": {
                  "equals": {
                    "type": [
                      "integer",
                      "number",
                      "null"
                    ]
                  },
                  "equals_field": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "field": {
                    "type": "string"
                  },
                  "if_present": {
                    "type": "boolean"
                  },
                  "in_field": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "other_field": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "tolerance": {
                    "type": "number"
                  },
                  "type": {
                    "type": "string"
                  },
                  "value": {
                    "type": [
                      "integer",
                      "number",
                      "string",
                      "null"
                    ]
                  },
                  "values": {
                    "type": [
                      "array",
                      "null"
                    ]
                  }
                },
                "required": [
                  "type",
                  "field"
                ],
                "type": "object"
              },
              "type": [
                "array",
                "null"
              ]
            },
            "strict_content_check": {
              "description": "Opt-in. When true, any string in submitted_output containing control characters (e.g. null bytes) or embedded HTML/script markup makes the result 'fail'. When false (default) this is not checked at all.",
              "type": "boolean"
            },
            "submitted_output": {
              "description": "Required. The output being checked: any JSON value (object, array, string, number, boolean or null), exactly as the AI agent produced it."
            },
            "task_id": {
              "description": "Your own identifier for this verification. 1-200 printable characters, no control characters and no lone Unicode surrogate; a request outside that range is rejected (422), not truncated.",
              "type": "string"
            }
          },
          "required": [
            "task_id",
            "expected_schema",
            "submitted_output"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
       

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