{
  "dataset": "Agentic commerce protocol conformance inventory",
  "datasetVersion": "2026-08-27",
  "methodology": "https://agenticcommerceprotocol.info/methodology",
  "interpretation": "published means an official public artifact was identified; not-identified is scoped to this dated review and is not proof of universal absence; a validator or TCK is not presented as a certification program",
  "reuseStatus": "No separate reuse license has been published for this export.",
  "records": [
    {
      "protocol": "Universal Commerce Protocol",
      "slug": "ucp",
      "reviewed": "2026-08-27",
      "release": "v2026-08-25",
      "releaseUrl": "https://github.com/Universal-Commerce-Protocol/ucp/releases/tag/v2026-08-25",
      "specification": "published",
      "specificationUrl": "https://github.com/Universal-Commerce-Protocol/ucp",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/Universal-Commerce-Protocol/ucp-schema",
      "conformanceSuite": "published",
      "conformanceUrl": "https://github.com/Universal-Commerce-Protocol/conformance",
      "validationTool": "published",
      "validationToolUrl": "https://github.com/Universal-Commerce-Protocol/ucp-schema",
      "limitation": "The public suite and schema tooling were inventoried, not executed. The observed Flower Shop fixture and CI target 2026-04-08, so compatibility with v2026-08-25 is not established here."
    },
    {
      "protocol": "Agentic Commerce Protocol",
      "slug": "acp",
      "reviewed": "2026-08-27",
      "release": "2026-04-17",
      "releaseUrl": "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/tree/main/spec/2026-04-17",
      "specification": "published",
      "specificationUrl": "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/tree/main/spec/2026-04-17",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "The official repository publishes OpenAPI, JSON Schema, examples and manual RFC checklists. An official automated conformance suite or validator was not identified in the reviewed sources."
    },
    {
      "protocol": "Agent Payments Protocol",
      "slug": "ap2",
      "reviewed": "2026-08-27",
      "release": "v0.2",
      "releaseUrl": "https://blog.google/products-and-platforms/platforms/google-pay/agent-payments-protocol-fido-alliance/",
      "specification": "published",
      "specificationUrl": "https://ap2-protocol.org/ap2/specification/",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/google-agentic-commerce/AP2",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "The official repository publishes canonical JSON schemas, an SDK and samples. A vendor-neutral conformance suite was not identified in its reviewed overview."
    },
    {
      "protocol": "Model Context Protocol",
      "slug": "mcp",
      "reviewed": "2026-08-27",
      "release": "2026-07-28",
      "releaseUrl": "https://blog.modelcontextprotocol.io/posts/2026-07-28/",
      "specification": "published",
      "specificationUrl": "https://github.com/modelcontextprotocol/modelcontextprotocol",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/modelcontextprotocol/modelcontextprotocol/tree/main/schema",
      "conformanceSuite": "published",
      "conformanceUrl": "https://github.com/modelcontextprotocol/conformance",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "The official repository publishes TypeScript and JSON Schema plus an official client/server conformance framework with frozen requirements for the 2026-07-28 specification. This is not a certification program."
    },
    {
      "protocol": "Agent2Agent Protocol",
      "slug": "a2a",
      "reviewed": "2026-08-27",
      "release": "v1.0.0",
      "releaseUrl": "https://github.com/a2aproject/A2A/releases/tag/v1.0.0",
      "specification": "published",
      "specificationUrl": "https://a2a-protocol.org/latest/",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/a2aproject/A2A/tree/main/specification",
      "conformanceSuite": "published",
      "conformanceUrl": "https://github.com/a2aproject/a2a-tck",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "The official project publishes the specification, SDKs, samples and a Technology Compatibility Kit for gRPC, JSON-RPC and HTTP+JSON. The TCK is not presented here as a certification program."
    },
    {
      "protocol": "x402",
      "slug": "x402",
      "reviewed": "2026-08-27",
      "release": "Current main; no dated release asserted",
      "releaseUrl": "https://github.com/x402-foundation/x402",
      "specification": "published",
      "specificationUrl": "https://github.com/x402-foundation/x402/tree/main/specs",
      "machineReadable": "published",
      "machineReadableUrl": "https://github.com/x402-foundation/x402",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "The official repository contains specifications, SDKs, examples and end-to-end tests. Those project tests are not presented here as a vendor-neutral conformance certification."
    },
    {
      "protocol": "Machine Payments Protocol",
      "slug": "mpp",
      "reviewed": "2026-08-27",
      "release": "Launch specification, 2026-03-18",
      "releaseUrl": "https://stripe.com/blog/machine-payments-protocol",
      "specification": "published",
      "specificationUrl": "https://mpp.dev/protocol",
      "machineReadable": "not-identified",
      "machineReadableUrl": "",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "published",
      "validationToolUrl": "https://mpp.dev/sdk/typescript/cli",
      "limitation": "The protocol requires payment methods to define request and payload schemas, but a separate normative neutral schema bundle was not identified. The official mppx validate command checks servers end to end; it is a validator, not a certification program."
    },
    {
      "protocol": "Trusted Agent Protocol",
      "slug": "tap",
      "reviewed": "2026-08-27",
      "release": "No tagged release asserted",
      "releaseUrl": "https://github.com/visa/trusted-agent-protocol",
      "specification": "published",
      "specificationUrl": "https://github.com/visa/trusted-agent-protocol",
      "machineReadable": "not-identified",
      "machineReadableUrl": "",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "Visa publishes merchant specifications, Pydantic implementation models and a sample system under custom terms. No distinct normative JSON Schema, OpenAPI or protobuf artifact, tagged release, automated conformance suite or validator was identified."
    },
    {
      "protocol": "Mastercard Agent Pay",
      "slug": "agent-pay",
      "reviewed": "2026-08-27",
      "release": "Proprietary program with a public acceptance framework",
      "releaseUrl": "https://www.mastercard.com/us/en/news-and-trends/stories/2025/agentic-commerce-framework.html",
      "specification": "not-identified",
      "specificationUrl": "",
      "machineReadable": "not-identified",
      "machineReadableUrl": "",
      "conformanceSuite": "not-identified",
      "conformanceUrl": "",
      "validationTool": "not-identified",
      "validationToolUrl": "",
      "limitation": "Mastercard publishes a proprietary Agent Pay Acceptance Framework that uses Web Bot Auth and aligns with MCP, A2A and ACP, but not as an autonomous open specification. Verifiable Intent is a separate open-source initiative transferred to FIDO. No Agent Pay normative machine-readable artifact, automated conformance suite or validator was identified."
    }
  ]
}