--- title: "Circleback agent readiness score: 73/100 · Agentrail" description: "How well AI agents can find, read, use and pay Circleback — agent readiness score from Agentrail (agentrail.co)." canonical: "https://www.agentrail.co/agent-readiness/circleback.ai" --- Full report ## See what each check found, and how to fix it. Evidence, step-by-step fixes and your score over time, for your own site. [Get started →](https://app.agentrail.co/login?utm%5Fsource=agentrail.co&utm%5Fmedium=website&utm%5Fcampaign=agent-readiness%2Fcircleback.ai&utm%5Fcontent=company-report) Free to start. No card. Access 18 to fix - Content without JavaScriptRequiredHow to fix → - Agent discovery fileRequiredHow to fix → - A2A / agent-cardRecommendedHow to fix → - Listed on skills.shEmergingHow to fix → Fixes unlock with the full report Where the score comes from 66 of 90 points How circleback.ai scores on each of the four questions agents ask. Discovery17/20 Access25/30 Usability24/40 Paymentsnot scored yet Strongest ### Discovery ARD discovery and Wikipedia / Wikidata entity presence are missing. 17/20 Most to gain ### Usability auth.md exists, auth.md structure, and 13 more are missing. 24/40 Most to gain ### Access Content without JavaScript, Agent discovery file, and 9 more are missing. 25/30 Not scored yet ### Payments ( bonus ) 6 checks partly met. Counts when scoring opens. — Every check 125checks - Passed**25** - To fix**34** - Not in the score**66** 59 checks count toward the score. The other 66 are tracked for later. Discovery17 of 202 to fix2 passed ARD discoveryRequired0 / 1 Wikipedia / Wikidata entity presenceRecommended0 / 4 Brand name discoverabilityRequired3 / 3 robots.txt AI crawler policyRequired2 / 2 \+ 11 checks not in the score AI Catalog discoveryRecommendedNot counted ARD entry validityRecommendedNot counted ARD trust manifestRecommendedNot counted Category share of voiceRecommendedNot counted Developer resource discoverabilityRecommendedNot counted Listed in MCP registriesRecommendedNot counted NPM/PyPI SDK packageRecommendedNot counted Agent platform configsEmergingNot counted Agent Plugins manifestEmergingNot counted Registry brandingEmergingNot counted ChatGPT app listedRecommendedNot counted Access25 of 306 to fix5 partly14 passed Agent discovery fileRequired0 / 2 A2A / agent-cardRecommended0 / 2 HTTP Link headers (RFC 8288)Required0 / 1 Sitemap freshness (lastmod)Recommended0 / 1 API catalog (RFC 9727)Required0 / 2 Markdown content negotiation (acceptmarkdown.com)Recommended0 / 1 Content without JavaScriptRequired2 / 3 JSON-LD structured dataRequired2 / 4 Organization schema completenessRecommended1 / 2 Schema type breadthRecommended1 / 2 Trust anchor pagesRequired1 / 2 Sitemap existsRequired2 / 2 Not blocked by bot detectionRequired2 / 2 MCP well-known discoveryRecommended2 / 2 robots.txt agent-user policyRequired2 / 2 llms.txt existsRequired1 / 1 llms.txt formattingRecommended2 / 2 Pricing info accessibleRequired3 / 3 JSON-LD entity linking (sameAs)Recommended2 / 2 Metadata completenessRequired2 / 2 llms.txt links resolveRecommended2 / 2 Redirect hygieneRecommended1 / 1 Page token budgetRecommended1 / 1 OpenAPI spec publishedRequired7 / 7 Agent crawler reachabilityRecommended2 / 2 \+ 17 checks not in the score Agent Skills index conformance (v0.2.0)EmergingNot counted Listed on skills.shEmergingNot counted pricing.md existsEmergingNot counted NLWeb Schema FeedsEmergingNot counted Agent mode viewEmergingNot counted Markdown URL fallbackEmergingNot counted Modular llms.txt per product areaEmergingNot counted Public API/docs linked from homepageRequiredNot counted Agent instruction / when-to-useRequiredNot counted Skills.sh skill qualityEmergingNot counted Markdown alternate linkEmergingNot counted Markdown frontmatter metadataEmergingNot counted Code fence validityEmergingNot counted Content behind authRecommendedNot counted Developer portalRecommendedNot counted Markdown agent docsEmergingNot counted Bot-UA markdown servingEmergingNot counted Usability24 of 4011 to fix4 partly9 passed auth.md existsRequired0 / 2 auth.md structureRecommended0 / 2 Agent auth WWW-Authenticate hintRecommended0 / 1 agent\_auth endpoints reachableRecommended0 / 2 MCP server / manifestRequired0 / 6 WebMCP supportRequired0 / 5 Rate limit response headersRecommended0 / 2 Idempotency-Key supportRecommended0 / 3 REST versioning / deprecation policyRecommended0 / 3 REST async-job patternRecommended0 / 2 Sandbox / test environmentRecommended0 / 2 Agent auth discovery metadataRecommended1 / 3 Agent-friendly 404sRecommended1 / 2 API schema complexity analysisRecommended1 / 2 Function calling compatibilityRecommended1 / 2 Public API with reachable endpointsRequired7 / 7 OAuth 2.0 supportRequired5 / 5 Scoped permissionsRecommended5 / 5 OAuth Protected Resource metadata (RFC 9728)Required2 / 2 JSON error responsesRequired4 / 4 REST typed error modelRecommended3 / 3 REST batch / bulk endpointRecommended2 / 2 Accessible document structureRecommended3 / 3 Accessible names on controlsRecommended2 / 2 \+ 38 checks not in the score MCP tool descriptionsRecommendedNot counted MCP parameter schemasRecommendedNot counted MCP server identityRecommendedNot counted MCP tool listingRecommendedNot counted MCP tool namingRecommendedNot counted MCP auth mechanismRecommendedNot counted MCP OAuth metadataRecommendedNot counted MCP PKCE S256 supportRecommendedNot counted Agent onboarding frictionRecommendedNot counted Web Bot Auth directoryEmergingNot counted auth.md walkthrough simulationRecommendedNot counted MCP error handlingRecommendedNot counted MCP modern transportRecommendedNot counted REST pagination patternRecommendedNot counted CLI tool availableRecommendedNot counted Multi-language SDK packagesRecommendedNot counted NLWeb /ask endpointEmergingNot counted NLWeb streaming supportEmergingNot counted REST response schema coverageRecommendedNot counted MCP tool annotationsRecommendedNot counted MCP server-card.jsonRecommendedNot counted Product + docs MCP coverageRecommendedNot counted MCP resources exposedRecommendedNot counted GraphQL typed error modelRecommendedNot counted GraphQL versioning / deprecation policyRecommendedNot counted GraphQL pagination patternRecommendedNot counted GraphQL async-job patternRecommendedNot counted GraphQL schema description coverageRecommendedNot counted GraphQL batch mutationsRecommendedNot counted Native interactive controlsRecommendedNot counted Form control labelingRecommendedNot counted Accessibility-tree injection safety (bonus)RecommendedNot counted MCP Apps supportRecommendedNot counted A2UI / generative UI supportEmergingNot counted MCP Apps UI qualityRecommendedNot counted MCP App view reachableRecommendedNot counted MCP App view CSPRecommendedNot counted MCP resource qualityRecommendedNot counted PaymentsNot scored yet6 partly MPP payment protocolRequired0 / 2 x402 payment protocolRequired0 / 2 UCP - Universal Commerce ProtocolRequired0 / 3 ACP - Agentic Commerce ProtocolRequired0 / 3 ACP delegate paymentRecommended0 / 3 AP2 - Agent Payments ProtocolRecommended0 / 3