# Griffin **Canonical:** https://apis.io/providers/griffin/ **Website:** https://griffin.com/ **APIs profiled:** 28 Griffin is a UK-regulated bank (Financial Conduct Authority authorised, Prudential Regulation Authority regulated) offering Banking-as-a-Service via a REST API. Fintechs and businesses embed FSCS-eligible bank accounts, payments (Faster Payments, BACS, CHAPS, book transfers, Confirmation of Payee), automated KYC/KYB onboarding (Verify), client-money and safeguarding accounts, savings accounts, and open banking directly into their own products. The v0 API uses API-key authentication with mandatory HTTP message signatures in live, documented webhooks, a full sandbox, and a first-party MCP server. ## Kin Score — 53.1 / 100 (developing) Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 53.1). | Facet | Score | |---|---| | Discoverability | 81.5 | | Contract Quality | 63.1 | | Governance | 20.8 | | Operational Transparency | 52.6 | | Developer Ergonomics | 73.4 | | Commercial Clarity | 44.7 | Regulatory layer — **Banking & Open Finance**: 31.6 (matched via tags). ## Agent readiness — 54.7 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | MCP Server | yes | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | documented | | OpenAPI Examples | verified | | Rate Limit Signal | no | | Event Surface Described | yes | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium). ## APIs (28) - **Griffin API keys API** — The `api-key-secret` field is only shown once when you create an API key. We cannot recover the value, so you should store it securely. Pass an `Authorization` header with `Grif... - **Griffin Bank account holds API** — The Bank account holds API from Griffin — 2 operation(s) for bank account holds. - **Griffin Bank account restrictions API** — Restrictions prevent payments on a bank account. A `freeze` blocks outbound payments while still allowing inbound payments. A `block` prevents both inbound and outbound payments... - **Griffin Bank accounts API** — Bank accounts are used for managing funds. Every bank account is opened against a [bank product](/docs/guides/bank-products), which determines the account's behaviour (type, poo... - **Griffin Claims API** — A [claim](/docs/terms/claim) is an unverified data point or series of data points attached to a [legal person](#tag/Legal-persons). Claims are verified by running a [verificatio... - **Griffin Companies House API** — The Companies House API from Griffin — 1 operation(s) for companies house. - **Griffin Confirmation of payee API** — The Confirmation of payee API from Griffin — 2 operation(s) for confirmation of payee. - **Griffin Connectivity API** — The Connectivity API from Griffin — 1 operation(s) for connectivity. - **Griffin Decisions API** — The Decisions API from Griffin — 1 operation(s) for decisions. - **Griffin Events API** — The Events API from Griffin — 2 operation(s) for events. - **Griffin Invitations API** — Invitations enable [users](#tag/Users) to create new [memberships](#tag/Memberships) for their [organization](#tag/Organizations). The new membership is only created once when t... - **Griffin Legal person history API** — The Legal person history API from Griffin — 1 operation(s) for legal person history. - **Griffin Legal persons API** — In the Griffin API, your organization and your customers are all represented by [legal persons](/docs/terms/legal-person). When you sign up with Griffin, your organization will ... - **Griffin Memberships API** — Memberships represents the relationship between a [user](#tag/Users) and an [organization](#tag/Organizations). A membership must have at least one [role](#tag/Roles) assigned t... - **Griffin Message Signatures API** — Message Signatures confirm the identity of the sender and integrity of request messages. Key points: - Uses Ed25519 algorithm - Requires registering a public key with Griffin - ... - **Griffin Navigation API** — The Navigation API from Griffin — 1 operation(s) for navigation. - **Griffin Open banking API** — Open banking allows regulated third-party providers (TPPs) to access your customers' account data or initiate payments on their behalf. Griffin partners with [tell.money](https:... - **Griffin Organizations API** — The organization resource represents your company and acts as a container for the majority of other resources, including [legal persons](#tag/Legal-Persons) and [bank accounts](... - **Griffin Payees API** — A payee is the person or business to whom you are paying money. When you create a payee, you need to provide their name (`"account-holder"`), and their bank account number (`"ac... - **Griffin Payments API** — A payment captures the intent to move funds from a bank account to another bank account. Outbound payments can be made from your [bank account](#tag/Bank-accounts) to a [payee](... - **Griffin Pooled account membership API** — The Pooled account membership API from Griffin — 2 operation(s) for pooled account membership. - **Griffin Reliance onboarding API** — Reliance onboarding allows you to create and submit an application on behalf of your customer, using information about them you have already collected. For more information, che... - **Griffin Roles API** — A role represents a pre-defined set of capabilities that can be assigned to a [user](#tag/Users) via their [membership](#tag/Memberships) in an [organization](#tag/Organization)... - **Griffin Transactions API** — A transaction represents funds deposited or withdrawn from a bank account. Read more about transactions [in our guides](/docs/guides/transactions). - **Griffin Users API** — Users represent individuals who use the Griffin platform. A user must have a [membership](#tag/Memberships) in at least one [organization](#tag/Organizations), and may have memb... - **Griffin Verifications API** — The Verifications API from Griffin — 4 operation(s) for verifications. - **Griffin Webhooks API** — The Webhooks API from Griffin — 5 operation(s) for webhooks. - **Griffin Workflows API** — A [workflow](/docs/terms/workflow) determines which checks will be run against a [legal person](#tag/Legal-persons) as part of a [verification](#tag/Verifications) ## MCP servers (1) - **griffin-mcp.yml** ## Agentic access (1) - **Griffin Agentic Access** — 97 operations · 42 acting · 1 human-in-the-loop ## Security (2) - **Griffin Authentication** — apiKey · 1 scheme - **Griffin Domain Security** — TLSv1.2 · DMARC ## Tags Company, Fintech, Banking, Banking as a Service, Payments, KYC, Open Banking, Bank Accounts, Financial Services --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/griffin/). Scores are computed from the provider's own public artifacts under a published rubric.