Compare / Providers / Stripe vs Adyen

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Stripe vs Adyen: the payment API benchmark, scored

Stripe leads on the Kin Score (81.1 to 71.1) and agent readiness. Adyen ships nearly twice as many APIs and leads on governance.

Stripe

81.1/100
exemplar
Agent readiness 58.5 · agent-native
71 APIs · 16 artifact types
Best overall Cheapest entry
VS

Adyen

71.1/100
exemplar
Agent readiness 43.7 · agent-native
138 APIs · 14 artifact types

Two exemplars, and the closest artifact match on this page. Of the 15 artifact types between them, Stripe and Adyen share 14. The only difference is OAuth scopes, which Stripe publishes and Adyen does not.

Stripe wins overall at 81.1 against 71.1, and the gap is in operational transparency, where Stripe scores 100 against Adyen’s 55.3. Status, changelog and versioning are all public and machine-readable. Stripe also leads on developer ergonomics (94.6) and agent readiness (58.5 against 43.7), though both carry the top agent band, agent-native.

Adyen leads on what an enterprise buyer checks first: contract governance (31.8 against 22.0) and discoverability (63.3 against 56.7), across 138 APIs against Stripe’s 71. On cost, Stripe publishes a $10/month entry point and an 0.2% add-on rate. Adyen quotes Interchange++ at $0.13 + 0.60%. Both are graded A, read straight from each pricing page.

Facet by facet

The six Kin Score facets, 0 to 100. The facet leader is the one the tool names in facet_leaders. Each facet links to how it is measured.

FacetStripeAdyenLeader
Discoverability 56.7 63.3 Adyen
Contract Quality 72.1 68.7 Stripe
Contract Governance 22 31.8 Adyen
Operational Transparency 100 55.3 Stripe
Developer Ergonomics 94.6 82.1 Stripe
Access Clarity 92.1 92.1 Stripe
Kin Score81.171.1Stripe
Agent readiness58.5 agent-native43.7 agent-nativeStripe

Artifact coverage

Every artifact type either provider publishes, from the tool's artifact_matrix. Differences are listed first.

ArtifactStripeAdyen
Scopes✓—
APIsJSON✓✓
AgenticAccess✓✓
Arazzo✓✓
AsyncAPI✓✓
Documentation✓✓
FinOps✓✓
JSONSchema✓✓
MCP✓✓
OpenAPI✓✓
Overlay✓✓
Plans✓✓
RateLimits✓✓
Rules✓✓
Security✓✓

What it costs to get in

Each provider's economics as the tool returns them. Grade A is quoted on the provider's own pricing page, B is arithmetic on quotes, C a stated prior. Entry cost is the cheapest published paid tier — a floor on getting in, not the price of the API alone. Grades: A quoted on the provider's page, B arithmetic on quotes, C a stated prior.

StripeAdyen
Audiencebusiness-productbusiness-product
Pricing basisad-valoremad-valorem
Deliverymanagedmanaged
Entry (per month) $10.00 per month grade A · Custom domain not published
Marginal cost $0.50 per transaction, where you’re registered to collect taxes grade A —
Take rate 0.2% per successful online card transaction for accounts with custom payments pricing grade A $0.13 + Interchange+ + 0.60% grade A
Source pricing page read 2026-09-20 pricing page read 2026-09-20

Cheapest published way in: Stripe. Priced 1 of 2.

The full compare_providers response
{"providers":[{"slug":"stripe","name":"Stripe","band":"exemplar","composite":81.1,"trend":"flat","delta":0,"api_count":71,"api_count_basis":"split","artifact_types":["MCP","Security","Rules","Plans","RateLimits","FinOps","Scopes","AgenticAccess","Arazzo","Overlay","OpenAPI","Documentation","APIReference","AsyncAPI","JSONSchema","APIsJSON"],"industries":["artificial-intelligence","financial-services","financial-technology","payments","technology"],"regions":[],"facets":{"discoverability":56.7,"contract_quality":72.1,"contract_governance":22,"operational_transparency":100,"developer_ergonomics":94.6,"access_clarity":92.1},"facet_gap":{"discoverability":6.6,"contract_quality":0,"contract_governance":9.8,"operational_transparency":0,"developer_ergonomics":0,"access_clarity":0},"agent_readiness":{"score":58.5,"band":"agent-native"},"economics":{"audience":"business-product","pricing_basis":"ad-valorem","delivery":"managed","entry_usd_month":{"usd":10,"grade":"A","plan":"Custom domain","from":"$10.00 per month","unit":null,"formula":null},"marginal_usd":{"usd":0.5,"grade":"A","plan":"Tax Basic (API)","from":"$0.50 per transaction, where you’re registered to collect taxes","unit":"transaction","formula":"quoted price / quoted unit count"},"take_rate":{"percent":0.2,"fixed_usd":0,"cap_usd":null,"grade":"A","plan":"Authorization Boost (custom pricing accounts)","from":"0.2% per successful online card transaction for accounts with custom payments pricing"},"fetched":"2026-09-20","source":"https://stripe.com/pricing"}},{"slug":"adyen","name":"Adyen","band":"exemplar","composite":71.1,"trend":"flat","delta":0,"api_count":138,"api_count_basis":"split","artifact_types":["MCP","Security","Rules","Plans","RateLimits","FinOps","AgenticAccess","Arazzo","Overlay","OpenAPI","Documentation","AsyncAPI","JSONSchema","APIsJSON"],"industries":["artificial-intelligence","financial-services","financial-technology","payments"],"regions":[],"facets":{"discoverability":63.3,"contract_quality":68.7,"contract_governance":31.8,"operational_transparency":55.3,"developer_ergonomics":82.1,"access_clarity":92.1},"facet_gap":{"discoverability":0,"contract_quality":3.4,"contract_governance":0,"operational_transparency":44.7,"developer_ergonomics":12.5,"access_clarity":0},"agent_readiness":{"score":43.7,"band":"agent-native"},"economics":{"audience":"business-product","pricing_basis":"ad-valorem","delivery":"managed","entry_usd_month":null,"marginal_usd":null,"take_rate":{"percent":0.6,"fixed_usd":0,"cap_usd":null,"grade":"A","plan":"Cards (Interchange++)","from":"$0.13 + Interchange+ + 0.60%"},"fetched":"2026-09-20","source":"https://www.adyen.com/pricing"}}],"artifact_union":["APIsJSON","AgenticAccess","Arazzo","AsyncAPI","Documentation","FinOps","JSONSchema","MCP","OpenAPI","Overlay","Plans","RateLimits","Rules","Scopes","Security"],"artifact_matrix":{"APIsJSON":{"stripe":true,"adyen":true},"AgenticAccess":{"stripe":true,"adyen":true},"Arazzo":{"stripe":true,"adyen":true},"AsyncAPI":{"stripe":true,"adyen":true},"Documentation":{"stripe":true,"adyen":true},"FinOps":{"stripe":true,"adyen":true},"JSONSchema":{"stripe":true,"adyen":true},"MCP":{"stripe":true,"adyen":true},"OpenAPI":{"stripe":true,"adyen":true},"Overlay":{"stripe":true,"adyen":true},"Plans":{"stripe":true,"adyen":true},"RateLimits":{"stripe":true,"adyen":true},"Rules":{"stripe":true,"adyen":true},"Scopes":{"stripe":true,"adyen":false},"Security":{"stripe":true,"adyen":true}},"facet_leaders":{"discoverability":{"provider":"adyen","score":63.3},"contract_quality":{"provider":"stripe","score":72.1},"contract_governance":{"provider":"adyen","score":31.8},"operational_transparency":{"provider":"stripe","score":100},"developer_ergonomics":{"provider":"stripe","score":94.6},"access_clarity":{"provider":"stripe","score":92.1}},"best_overall":"stripe","cheapest_entry":"stripe","economics_basis":{"stamp_generated":"2026-10-17","priced":1,"of":2,"note":"Entry cost is the cheapest published paid tier — a floor on getting in, not the price of the API alone. Grades: A quoted on the provider's page, B arithmetic on quotes, C a stated prior."},"unknown":[]}

Result read 2026-10-27. Scores move as providers publish; run it yourself for today's numbers.

Run this comparison yourself

Everything above came from one call to compare_providers. Swap in any two of the catalog's providers (three or more works too) and you get the same answer for your own shortlist. It is an Understanding tool, included in the Understanding and Influence plans, or pay per call.

From any MCP client connected to https://apis.io/mcp:
{"name": "compare_providers", "arguments": {"providers": ["stripe","adyen"]}}
Over the REST API:
curl "https://apis.io/api/v1/compare?providers=stripe,adyen" \
  -H "X-API-Key: $APIS_IO_KEY"
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