ArtifactGuard: Signed AI Deliverable QA

Use ArtifactGuard as the last step before an AI agent delivers a JSON, ZIP, PDF, or DOCX file to a customer. The buyer receives a deterministic PASS, WARN, or FAIL receipt containing the artifact hash, contract hash, individual checks, validator version, timestamp, and an Ed25519 signature.

One purchase case

An AI report agent creates result.json. Before delivery, it asks ArtifactGuard to verify that the file is valid JSON, contains a status field equal to ready, and does not contain configured forbidden patterns. The agent then attaches the signed receipt to its final handoff.

This is delivery-contract QA, not antivirus scanning, legal certification, or a guarantee that the document's claims are true.

Related MCP server: agent-receipts-mcp

Buy through Apify

Set your own Apify API token locally. Never commit it.

export APIFY_TOKEN="your-token"
curl --fail-with-body \
  -X POST \
  "https://api.apify.com/v2/acts/analytical_gratefulness~artifactguard-agent/run-sync-get-dataset-items?format=json" \
  -H "Authorization: Bearer ${APIFY_TOKEN}" \
  -H "Content-Type: application/json" \
  --data-binary @examples/validate_artifact.json \
  --output receipt-response.json

validate-manifest costs USD 0.01 and validate-artifact costs USD 0.05. Malformed requests and readiness checks do not trigger an application event charge. A completed inspection whose result is FAIL is still a valid paid result.

• ArtifactGuard Agent on Apify

• ArtifactGuard REST/MCP Actor

Buy directly with x402

The direct endpoint returns a standards-based 402 Payment Required response with the price and payment requirements before any artifact is processed:

curl -i \
  -X POST \
  https://artifactguard-kl4hfo6j2q-as.a.run.app/v1/validate/artifact \
  -H "Content-Type: application/json" \
  --data-binary @examples/x402_validate_artifact.json

An x402-compatible buyer can satisfy that payment requirement and repeat the same request with a payment signature. Do not place wallet private keys in a request body, repository, or log.

Free discovery endpoints:

• GET https://artifactguard-kl4hfo6j2q-as.a.run.app/capabilities

• GET https://artifactguard-kl4hfo6j2q-as.a.run.app/examples

• GET https://artifactguard-kl4hfo6j2q-as.a.run.app/presets

MCP

The Apify Standby Actor exposes Streamable HTTP MCP at:

https://analytical-gratefulne--artifactguard.apify.actor/mcp

Supply your own Apify token as an Authorization: Bearer ... header in the MCP client. Available tools include validate_manifest, validate_artifact, and the free verify_receipt tool.

Verify a receipt independently

Install the single verifier dependency and pass either a receipt object or the full ArtifactGuard response envelope:

python -m pip install -r requirements.txt
python verify_receipt.py receipt-response.json

The verifier retrieves only the public Ed25519 key identified by the receipt, recomputes the canonical receipt hash, and verifies the signature. It never needs an API token, payment credential, or private key.

Files

• examples/validate_artifact.json: Apify Actor input.

• examples/x402_validate_artifact.json: direct x402 API input.

• examples/validate_manifest.json: inexpensive manifest-only Actor input.

• verify_receipt.py: independent receipt hash and signature verifier.

• server.json: Official MCP Registry metadata for the authenticated remote.