{
  "@context": "https://schema.org",
  "name": "Authorization API directory",
  "category": "Authorization",
  "publisher": "AuthorizationAPIs.com",
  "domain": "authorizationapis.com",
  "source": "Official provider documentation; curated 2026-09-17",
  "snapshot_date": "2026-09-17",
  "representative_queries": [
    "Find APIs for fine-grained application authorization",
    "Find relationship-based authorization APIs similar to Zanzibar",
    "Find policy APIs for RBAC, ABAC or contextual access decisions",
    "Find authorization services suitable for agent or service permissions"
  ],
  "count": 8,
  "records": [
    {
      "name": "Aserto Authorization API",
      "provider": "Aserto",
      "category": "Authorization",
      "description": "Authorization APIs and policy services for fine-grained application access control.",
      "capabilities": [
        "Authorization",
        "Policy",
        "Directory"
      ],
      "website": "https://www.aserto.com/",
      "docs_url": "https://docs.aserto.com/",
      "auth_methods": [],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "aserto-authorization-api",
      "public_documentation": true,
      "authentication_verified": false,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/aserto-authorization-api"
    },
    {
      "name": "AWS Verified Permissions API",
      "provider": "AWS",
      "category": "Authorization",
      "description": "Managed fine-grained authorization service using Cedar policies for application permissions.",
      "capabilities": [
        "Cedar",
        "Policy evaluation",
        "Fine-grained authorization"
      ],
      "website": "https://aws.amazon.com/verified-permissions/",
      "docs_url": "https://docs.aws.amazon.com/verifiedpermissions/latest/apireference/Welcome.html",
      "auth_methods": [
        "AWS Signature"
      ],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "aws-verified-permissions-api",
      "public_documentation": true,
      "authentication_verified": true,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/aws-verified-permissions-api"
    },
    {
      "name": "Cerbos PDP API",
      "provider": "Cerbos",
      "category": "Authorization",
      "description": "Policy decision point APIs for application authorization and policy checks.",
      "capabilities": [
        "Policy decisions",
        "RBAC",
        "ABAC"
      ],
      "website": "https://www.cerbos.dev/",
      "docs_url": "https://docs.cerbos.dev/cerbos/latest/api/index.html",
      "auth_methods": [],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "cerbos-pdp-api",
      "public_documentation": true,
      "authentication_verified": false,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/cerbos-pdp-api"
    },
    {
      "name": "Open Policy Agent REST API",
      "provider": "Open Policy Agent",
      "category": "Authorization",
      "description": "REST API for policy management, rule evaluation, queries, compilation and health/status operations.",
      "capabilities": [
        "Policy evaluation",
        "Rego",
        "ABAC",
        "Policy API"
      ],
      "website": "https://www.openpolicyagent.org/",
      "docs_url": "https://www.openpolicyagent.org/docs/rest-api",
      "auth_methods": [],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "open-policy-agent-rest-api",
      "public_documentation": true,
      "authentication_verified": false,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/open-policy-agent-rest-api"
    },
    {
      "name": "OpenFGA API",
      "provider": "OpenFGA",
      "category": "Authorization",
      "description": "API for relationship-based fine-grained authorization models, tuples and access checks.",
      "capabilities": [
        "ReBAC",
        "Authorization models",
        "Access checks"
      ],
      "website": "https://openfga.dev/",
      "docs_url": "https://openfga.dev/docs/getting-started/configure-model",
      "auth_methods": [
        "Bearer token / deployment specific"
      ],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "openfga-api",
      "public_documentation": true,
      "authentication_verified": true,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/openfga-api"
    },
    {
      "name": "Oso Cloud API",
      "provider": "Oso",
      "category": "Authorization",
      "description": "Authorization service for application permissions and relationship-aware access decisions.",
      "capabilities": [
        "Authorization",
        "Permissions",
        "Relationships"
      ],
      "website": "https://www.osohq.com/",
      "docs_url": "https://www.osohq.com/docs",
      "auth_methods": [
        "API key"
      ],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "oso-cloud-api",
      "public_documentation": true,
      "authentication_verified": true,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/oso-cloud-api"
    },
    {
      "name": "Permit.io API",
      "provider": "Permit.io",
      "category": "Authorization",
      "description": "Authorization platform APIs for policy, users, resources, roles and permission checks.",
      "capabilities": [
        "RBAC",
        "ABAC",
        "ReBAC",
        "Policy"
      ],
      "website": "https://www.permit.io/",
      "docs_url": "https://api.permit.io/v2/redoc",
      "auth_methods": [
        "API key"
      ],
      "openapi": "Yes",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "permit-io-api",
      "public_documentation": true,
      "authentication_verified": true,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/permit-io-api"
    },
    {
      "name": "SpiceDB API",
      "provider": "AuthZed",
      "category": "Authorization",
      "description": "Relationship-based authorization service implementing Zanzibar-style permissions with gRPC and HTTP APIs.",
      "capabilities": [
        "ReBAC",
        "Permissions",
        "Relationships"
      ],
      "website": "https://authzed.com/spicedb",
      "docs_url": "https://authzed.com/docs/spicedb/getting-started/discovering-spicedb",
      "auth_methods": [
        "Token"
      ],
      "openapi": "Unknown",
      "mcp": "Unknown",
      "a2a": "Unknown",
      "x402": "Unknown",
      "llms_txt": "Unknown",
      "agent_readiness_score": null,
      "slug": "spicedb-api",
      "public_documentation": true,
      "authentication_verified": true,
      "agent_actionable": true,
      "tracked_website_url": "https://authorizationapis.com/go/api/spicedb-api"
    }
  ]
}