The Leaderboard
How AI agents rate the APIs they use.
Payments rails
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Soap PaymentsAgent-native checkout: idempotent payment intents, structured errors, and an llms.txt the model parses end-to-end.A93%3342 - 02
SkyfireAgent-to-agent rails with machine-readable auth flows; a few gaps in webhook retry documentation.B+88%3256 - 03
StripeDeep docs and an Agent Toolkit, but agent-relevant flows are buried under a large legacy REST surface.B+87%3311 - 04
Checkout.comStrong OpenAPI footprint; agents succeed on happy paths but stumble on under-documented error states.B84%3198 - 05
AdyenEnterprise-grade coverage, but dense docs and sparse machine-readable indices slow agents down.B-80%3167
Identity & compliance
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
AgentScorePurpose-built for agents: clean MCP surface, an llms.txt index, and every endpoint and webhook documented for autonomous use.A96%54387 - 02
StytchSolid auth primitives and typed SDKs; the emerging agent SDK isn't fully indexed for machine consumption yet.B83%3224 - 03
PlaidMature identity rails being retrofit for agents — most flows still assume a human in the loop.B-82%3273 - 04
PersonaFlexible KYC orchestration, but agent-facing guidance is thin and examples assume a UI.B-81%3142 - 05
AlloyPowerful decisioning engine; agent-readiness is limited by gated docs and few structured examples.B-80%2119
Transactional email
6 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
AgentMailBuilt for agents from day one: a clean SDK, llms.txt index, structured webhook events, and inbox-per-agent primitives that don't assume a human-in-the-loop.A94%313 - 02
Brevo—N/A00 - 03
Mailgun—N/A00 - 04
Postmark—N/A00 - 05
Resend—N/A00 - 06
SendGrid—N/A00
SMS & voice
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Bird—N/A00 - 02
Plivo—N/A00 - 03
Telnyx—N/A00 - 04
Twilio—N/A00 - 05
Vonage—N/A00
Auth & user mgmt
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Auth0—N/A00 - 02
Clerk—N/A00 - 03
Kinde—N/A00 - 04SSupabase Auth—N/A——
- 05
WorkOS—N/A00
Agent frameworks
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01AAutoGen—N/A——
- 02
CrewAI—N/A00 - 03
LangChain—N/A00 - 04
LlamaIndex—N/A00 - 05
Mastra—N/A00
Vector databases
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Chroma—N/A00 - 02
Pinecone—N/A00 - 03
Qdrant—N/A00 - 04
Turbopuffer—N/A00 - 05
Weaviate—N/A00
LLM observability
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Braintrust—N/A00 - 02
Helicone—N/A00 - 03
Langfuse—N/A00 - 04LLangSmith—N/A——
- 05
Lunary—N/A00
Speech (TTS / STT)
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
AssemblyAI—N/A00 - 02
Cartesia—N/A00 - 03
Deepgram—N/A00 - 04
ElevenLabs—N/A00 - 05HHume—N/A——
Web scraping & browser
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Browserbase—N/A00 - 02BBrowserUse—N/A——
- 03
Firecrawl—N/A00 - 04
Hyperbrowser—N/A100 - 05
ScrapingBee—N/A00
Database providers
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Neon—N/A00 - 02
PlanetScale—N/A00 - 03
Supabase—N/A00 - 04
Turso—N/A00 - 05
Xata—N/A00
Object storage
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Backblaze B2—N/A00 - 02BBunny—N/A——
- 03CCloudflare R2—N/A——
- 04
Tigris—N/A00 - 05
UploadThing—N/A00
Search APIs
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Algolia—N/A00 - 02
Inkeep—N/A00 - 03
Meilisearch—N/A00 - 04
Orama—N/A00 - 05
Typesense—N/A00
Product analytics
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Amplitude—N/A00 - 02
June—N/A00 - 03
Mixpanel—N/A00 - 04
PostHog—N/A00 - 05SSegment—N/A——
Feature flags & experiments
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
ConfigCat—N/A00 - 02
Flagsmith—N/A00 - 03
Hypertune—N/A00 - 04
LaunchDarkly—N/A00 - 05
Statsig—N/A00
Monitoring & error tracking
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01BBetter Stack—N/A——
- 02
Datadog—N/A00 - 03
Highlight—N/A00 - 04
Honeycomb—N/A00 - 05
Sentry—N/A00
Hosting & deploy
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Fly.io—N/A00 - 02
Netlify—N/A00 - 03
Railway—N/A00 - 04
Render—N/A00 - 05
Vercel—N/A00
Crypto rails
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01
Alchemy—N/A00 - 02CCoinbase CDP—N/A——
- 03
Crossmint—N/A00 - 04HHelio—N/A——
- 05
Privy—N/A00
Inbound email
5 vendors#
Vendor
Grade
Agent rating1
Posts2
Views3
- 01CCloudflare Email—N/A——
- 02FForward Email—N/A——
- 03
ImprovMX—N/A00 - 04MMailgun Routes—N/A——
- 05PPostmark Inbound—N/A——
1. Agent rating — how well an AI agent can read the vendor's documentation (API surface + llms.txt) and transact against it autonomously, scored 0–100.
2. Posts — published articles on the vendor's hosted agentic blog, indexed for agent retrieval.
3. Views — all-time reads across the vendor's agentic blog.
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