Capital One
Capital One is a US money-center bank and financial services company offering credit cards, checking and savings accounts, loans, and auto financing. Through the Capital One DevExchange developer program the bank publishes a catalog of partner-facing production APIs for account lookup, transaction authorizations, credit offers, customer transactions, credit card applications, auto financing, proactive prescreen, partner account summary, shop with rewards, and public key sharing for client authentication. Access is secured with OAuth 2.0 and a public sandbox supports pre-production integration, with production access gated behind partner approval. Developer documentation is HTML-only (the portal is a single-page app); Capital One does not publish downloadable OpenAPI specifications. As an FDX member, Capital One also supports consumer-permissioned open-finance data access through aggregators in the US voluntary open-banking context.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Capital One the way a machine reads it — 21 machine-readable artifacts across 14 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Capital One scores 44.4/100 (developing), with a separate agent-readiness read of 18/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
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alt="Capital One Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/capital-one/)<!-- Kin Score · API Evangelist -->
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title="Capital One on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/capital-one/card.svg"
alt="Capital One Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Capital One
Each block below is one kind of artifact we hold for Capital One. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 14
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Capital One Account Lookup API
The Capital One Account Lookup API is a DevExchange product that lets approved partners resolve and retrieve consumer account information such as balances, transaction history, ...
Capital One Authorizations API
The Capital One Authorizations API lets approved partners programmatically validate and authorize financial transactions against Capital One's platform in real time. It supports...
Capital One Credit Offers API
The Capital One Credit Offers API provides approved partners programmatic access to Capital One credit card offers, including rewards programs, interest rates, fees, and eligibi...
Capital One Customer Transactions
The Capital One Customer Transactions product exposes consumer-permissioned transaction data so approved partners can retrieve and reconcile a customer's Capital One transaction...
Capital One Data Protection and Client Authentication Public Key Sharing API
The Capital One Data Protection and Client Authentication Public Key Sharing API lets integrating clients securely exchange public keys with Capital One to establish encrypted, ...
Capital One Digital Auto Financing Credit Application API
The Capital One Digital Auto Financing Credit Application API lets approved partners such as dealers and auto-marketplaces submit and process auto loan applications through Capi...
Capital One Enhanced Decisioning Data API
The Capital One Enhanced Decisioning Data API gives approved partners access to data signals that support credit, risk, and fraud decisioning workflows. Partners use it to enric...
Capital One In-Store Credit Card Payments API
The Capital One In-Store Credit Card Payments API lets merchants process Capital One credit card payments directly within their in-store point-of-sale flows. It supports accepti...
Capital One POS Credit Card Application API
The Capital One POS Credit Card Application API lets merchants embed a Capital One credit card application directly into their point-of-sale checkout experience, so customers ca...
Capital One Partner Account Summary API
The Capital One Partner Account Summary API provides approved partners consumer-permissioned access to account summary information such as balances, transaction history, and pen...
Capital One Pre-Application Orchestrator API
The Capital One Pre-Application Orchestrator API coordinates the pre-application steps for financial products such as loans and credit cards, including gathering and validating ...
Capital One Real-Time Proactive Prescreen API
The Capital One Real-Time Proactive Prescreen API lets approved partners assess consumer creditworthiness in real time to support targeted, pre-screened credit offers. Partners ...
Capital One Retrieve Consumer Bank Products API
The Capital One Retrieve Consumer Bank Products API lets approved partners access information about a consumer's Capital One banking products such as credit cards, checking acco...
Capital One Shop with Rewards API
The Capital One Shop with Rewards API lets partners integrate Capital One credit card reward points and benefits into online shopping experiences, so cardholders can unlock deal...
Scroll within the panel for all 14 ·
GraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
Capital One GraphQL Schema
Capital One is a financial services company offering credit cards, checking and savings accounts, loans, and auto financing in the United States. Through the Capital One DevExch...
GRAPHQLPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Capital One Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Capital One Finops
FINOPSSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Capital One — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/capital-one · machine-readable index on apis.io
This is an independent, third-party profile of Capital One, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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