--- title: "Serper agent readiness score: 30/100 · Agentrail" description: "Discovery is the strongest area, with an AI crawler policy in robots.txt and an NPM/PyPI SDK package, but both listed payment protocols are missing." canonical: "https://www.agentrail.co/agent-readiness/serper.dev" --- 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%2Fserper.dev&utm%5Fcontent=company-report) Free to start. No card. Access 28 to fix - Sitemap existsRequiredHow 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 27 of 90 points How serper.dev scores on each of the four questions agents ask. Discovery8/20 Access11/30 Usability8/40 Paymentsnot scored yet Strongest ### Discovery ARD discovery, Developer resource discoverability, and 2 more are missing. 8/20 Most to gain ### Usability Public API with reachable endpoints, OAuth 2.0 support, and 19 more are missing. 8/40 Most to gain ### Access Sitemap exists, Agent discovery file, and 16 more are missing. 11/30 Not scored yet ### Payments ( bonus ) 6 checks partly met. Counts when scoring opens. — Every check 125checks - Passed**12** - To fix**49** - Not in the score**64** 61 checks count toward the score. The other 64 are tracked for later. Discovery8 of 203 to fix1 partly2 passed ARD discoveryRequired0 / 1 Brand name discoverabilityRequired0 / 3 Wikipedia / Wikidata entity presenceRecommended0 / 4 Developer resource discoverabilityRecommended1 / 3 robots.txt AI crawler policyRequired2 / 2 NPM/PyPI SDK packageRecommended1 / 1 \+ 9 checks not in the score AI Catalog discoveryRecommendedNot counted ARD entry validityRecommendedNot counted ARD trust manifestRecommendedNot counted Category share of voiceRecommendedNot counted Listed in MCP registriesRecommendedNot counted Agent platform configsEmergingNot counted Agent Plugins manifestEmergingNot counted Registry brandingEmergingNot counted ChatGPT app listedRecommendedNot counted Access11 of 3017 to fix1 partly7 passed Sitemap existsRequired0 / 2 Agent discovery fileRequired0 / 2 A2A / agent-cardRecommended0 / 2 MCP well-known discoveryRecommended0 / 2 HTTP Link headers (RFC 8288)Required0 / 1 llms.txt existsRequired0 / 1 llms.txt formattingRecommended0 / 2 JSON-LD structured dataRequired0 / 4 Pricing info accessibleRequired0 / 3 Public API/docs linked from homepageRequired0 / 3 JSON-LD entity linking (sameAs)Recommended0 / 2 Metadata completenessRequired0 / 2 Organization schema completenessRecommended0 / 2 Schema type breadthRecommended0 / 2 OpenAPI spec publishedRequired0 / 7 API catalog (RFC 9727)Required0 / 2 Markdown content negotiation (acceptmarkdown.com)Recommended0 / 1 Trust anchor pagesRequired1 / 2 Content without JavaScriptRequired3 / 3 Not blocked by bot detectionRequired2 / 2 robots.txt agent-user policyRequired2 / 2 Redirect hygieneRecommended1 / 1 Page token budgetRecommended1 / 1 Developer portalRecommended6 / 6 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 Sitemap freshness (lastmod)RecommendedNot counted Agent instruction / when-to-useRequiredNot counted Skills.sh skill qualityEmergingNot counted llms.txt links resolveRecommendedNot counted Markdown alternate linkEmergingNot counted Markdown frontmatter metadataEmergingNot counted Code fence validityEmergingNot counted Content behind authRecommendedNot counted Markdown agent docsEmergingNot counted Bot-UA markdown servingEmergingNot counted Usability8 of 4019 to fix2 partly3 passed Public API with reachable endpointsRequired0 / 7 OAuth 2.0 supportRequired0 / 5 Scoped permissionsRecommended0 / 5 OAuth Protected Resource metadata (RFC 9728)Required0 / 2 auth.md existsRequired0 / 2 auth.md structureRecommended0 / 2 Agent auth discovery metadataRecommended0 / 3 Agent auth WWW-Authenticate hintRecommended0 / 1 agent\_auth endpoints reachableRecommended0 / 2 MCP server / manifestRequired0 / 6 Idempotency-Key supportRecommended0 / 3 REST typed error modelRecommended0 / 3 REST async-job patternRecommended0 / 2 CLI tool availableRecommended0 / 3 Sandbox / test environmentRecommended0 / 2 REST batch / bulk endpointRecommended0 / 2 Accessible document structureRecommended0 / 3 API schema complexity analysisRecommended0 / 2 Function calling compatibilityRecommended0 / 2 Agent onboarding frictionRecommended1 / 2 Agent-friendly 404sRecommended1 / 2 Rate limit response headersRecommended2 / 2 JSON error responsesRequired4 / 4 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 Web Bot Auth directoryEmergingNot counted auth.md walkthrough simulationRecommendedNot counted MCP error handlingRecommendedNot counted MCP modern transportRecommendedNot counted WebMCP supportRequiredNot counted REST versioning / deprecation policyRecommendedNot counted REST pagination patternRecommendedNot 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