emerging · 1.1

FAPI

Score 21.6 / 100 30 providers 21 APIs Search apis.io →

Providers using this tag (30)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Developing 22 Usable, with meaningful gaps to close
Starling BankFinancial-ServicesBankingOpen BankingPSD213 APIs53.3AuthleteCompanyAuthenticationOpenID ConnectAuthorization21 APIs52.1Virgin Money UKFinancial-ServicesBankingOpen BankingPSD212 APIs51.9Allica BankFinancial-ServicesBankingOpen BankingPSD24 APIs48.6Yorkshire Building SocietyFinancial-ServicesBankingBuilding SocietyOpen Banking6 APIs48.0Danske Bank (UK)Financial-ServicesBankingOpen BankingPSD211 APIs47.4Bank of Ireland (UK)Financial-ServicesBankingOpen BankingPSD25 APIs45.4MettleFinancial-ServicesBankingBusiness BankingOpen Banking4 APIs45.0Hampden & CoFinancial-ServicesBankingPrivate BankingOpen Banking4 APIs44.7InvestecFinancial-ServicesBankingOpen BankingPSD29 APIs44.4TSB BankFinancial-ServicesBankingOpen BankingPSD25 APIs44.4KrooFinancial-ServicesBankingOpen BankingPSD23 APIs44.2Financial Data Exchange (FDX)Financial DataOpen BankingOpen FinanceFinancial Data Exchange12 APIs43.6zopaCompanyBankingFintechOpen Banking12 APIs43.3Cashplus BankFinancial-ServicesBankingOpen BankingPSD210 APIs42.7C. Hoare & Co.Financial-ServicesBankingPrivate BankOpen Banking3 APIs42.6Lloyds Banking GroupFinancial-ServicesBankingOpen BankingPSD26 APIs41.9ThreddPaymentsUnited KingdomIssuer ProcessorCard Issuing10 APIs41.7CouttsFinancial-ServicesBankingPrivate BankWealth Management4 APIs40.9Santander UKFinancial-ServicesBankingOpen BankingPSD24 APIs40.7Metro BankFinancial-ServicesBankingOpen BankingPSD25 APIs40.3Secure Trust BankFinancial-ServicesBankingOpen BankingPSD24 APIs39.9
Thin 8 Limited public surface area
Tandem BankFinancial-ServicesBankingOpen BankingPSD23 APIs38.6IniciadorCompanyFintechOpen FinanceOpen Banking1 API35.9Shawbrook BankFinancial-ServicesBankingSavingsSpecialist Lending4 APIs35.8GB BankFinancial-ServicesBankingOpen BankingPSD24 APIs35.7NatWest GroupBankingOpen BankingFinancial-ServicesPayments21 APIs35.1Paragon BankFinancial-ServicesBankingSavingsMortgages4 APIs34.8Principality Building SocietyFinancial-ServicesBankingBuilding SocietySavings4 APIs33.2Leeds Building SocietyFinancial-ServicesBankingBuilding SocietyMutual4 APIs28.4

APIs with this tag (21)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Developing 5 Usable, with meaningful gaps to close
Virgin Money UK OIDC APIOpen Banking-compliant OpenID Connect provider for TPP authorisation. Live production discovery document co...51.9TSB OAuth Toolkit (OTK) ServerTSB's OpenID Connect / OAuth2 authorization server (Curity OAuth Toolkit, OTK Server APIs v4.3.1), backing ...44.4Secure Trust Bank Account & Transaction Information API (OBIE Read/Write, AIS)The OBIE Read/Write Account and Transaction Information (AIS) API - FAPI-secured access to account, balance...39.9Secure Trust Bank Confirmation of Funds API (OBIE Read/Write, CBPII)The OBIE Read/Write Confirmation of Funds (CBPII) API - FAPI-secured yes/no confirmation that funds are ava...39.9Secure Trust Bank Payment Initiation API (OBIE Read/Write, PIS)The OBIE Read/Write Payment Initiation (PIS) API - FAPI-secured initiation of domestic, scheduled, standing...39.9
Thin 16 Limited public surface area
Iniciador Open Finance APIIniciador's regulated Open Finance Brasil API surface for payment initiation and financial data sharing (ac...35.9Shawbrook Account & Transaction Information API (AIS, OBIE Standard, Unverified)UK Open Banking Read/Write Account & Transaction Information API (AISP) as defined by the OBIE Account and ...35.8Shawbrook Confirmation of Funds API (CBPII, OBIE Standard, Unverified)UK Open Banking Read/Write Confirmation of Funds API (CBPII) as defined by the OBIE Confirmation of Funds A...35.8Shawbrook Payment Initiation API (PIS, OBIE Standard, Unverified)UK Open Banking Read/Write Payment Initiation API (PISP) as defined by the OBIE Payment Initiation API Spec...35.8GB Bank Account and Transaction Information API (AIS)UK Open Banking Read/Write Account & Transaction Information API (AISP) - the OBIE standard for accessing a...35.7GB Bank Confirmation of Funds API (CBPII)UK Open Banking Read/Write Confirmation of Funds API (CBPII) - the OBIE standard for confirming whether fun...35.7GB Bank Payment Initiation API (PIS)UK Open Banking Read/Write Payment Initiation API (PISP) - the OBIE standard for initiating domestic, sched...35.7Paragon Bank Account and Transaction Information API (OBIE standard, unverified)The OBIE Read/Write Account and Transaction Information (AIS) API standard - FAPI-secured (OAuth2/OIDC, mut...34.8Paragon Bank Confirmation of Funds API (OBIE standard, unverified)The OBIE Read/Write Confirmation of Funds (CBPII) API standard - FAPI-secured yes/no confirmation of availa...34.8Paragon Bank Payment Initiation API (OBIE standard, unverified)The OBIE Read/Write Payment Initiation (PIS) API standard - FAPI-secured initiation of domestic, scheduled,...34.8OBIE Account & Transaction Information API (AIS - Standard, Out of Scope)The OBIE Read/Write Account and Transaction Information (AISP) standard for reading account, balance and tr...33.2OBIE Confirmation of Funds API (CBPII - Standard, Out of Scope)The OBIE Read/Write Confirmation of Funds (CBPII) standard for confirming whether funds are available on a ...33.2OBIE Payment Initiation API (PIS - Standard, Out of Scope)The OBIE Read/Write Payment Initiation (PISP) standard for initiating domestic, scheduled, standing-order, ...33.2OBIE Account and Transaction Information API (AIS, shared standard)The OBIE Read/Write Account and Transaction Information (AIS) standard for retrieving account, balance, tra...28.4OBIE Confirmation of Funds API (CBPII, shared standard)The OBIE Read/Write Confirmation of Funds (CBPII) standard for confirming whether funds are available on a ...28.4OBIE Payment Initiation API (PIS, shared standard)The OBIE Read/Write Payment Initiation (PIS) standard for initiating domestic, scheduled, standing-order, i...28.4

Score breakdown

Frequency
44.8
log-scaled weighted occurrences
Breadth
0.8
spread across providers
Quality lift
51.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

OBIE 24 co-occurrences CBPII 23 co-occurrences Confirmation of Funds 23 co-occurrences Domestic Payments 17 co-occurrences Domestic Standing Orders 16 co-occurrences Standing Orders 15 co-occurrences Funds Confirmations 15 co-occurrences Domestic Scheduled Payments 15 co-occurrences

Where this tag comes from

Provider tag24
Api tag21

Cohort brief

Auto-generated

The 30 providers in the APIs.io catalog tagged FAPI, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
30
all scored
Mean Kin Score
42.1
+21.4 vs catalog 20.7
Mean Agent Readiness
34.5
+24.8 vs catalog 9.7
Spread
28.4–53.3
median 42.7 · σ 5.7
How the 30 split by band
Exemplar 0Strong 0Developing 22Thin 8Emerging 0Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 47 17.5 +29.5 30
Discoverability 83.8 60.4 +23.4 30
Developer Ergonomics 34.1 17.9 +16.2 30
Contract Governance 18.8 6.4 +12.4 30
Access Clarity 28.5 22.3 +6.2 30
Operational Transparency 12.8 11.3 +1.5 30

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 67% 16% +51
MCP server (first-party) 0% 7% -7
Agent Skills 0% 0% 0
OAuth scopes 87% 9% +78
Security 100% 88% +12
Arazzo workflows 0% 2% -2
Governance rules 3% 13% -10

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Starling Bank 53.3
  2. 2 Authlete 52.1
  3. 3 Virgin Money UK 51.9
  4. 4 Allica Bank 48.6
  5. 5 Yorkshire Building Society 48
  6. 6 Danske Bank (UK) 47.4
  7. 7 Bank of Ireland (UK) 45.4
  8. 8 Mettle 45
  9. 9 Hampden & Co 44.7
  10. 10 Investec 44.4
Top by Agent Readiness
  1. 1 Allica Bank 52.3
  2. 2 NatWest Group 44.1
  3. 3 Yorkshire Building Society 43
  4. 4 Bank of Ireland (UK) 41.9
  5. 5 Danske Bank (UK) 41.5
  6. 6 TSB Bank 41.5
  7. 7 Virgin Money UK 41.5
  8. 8 Mettle 39
  9. 9 Lloyds Banking Group 38.7
  10. 10 Shawbrook Bank 37.6
All 30 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/fapi"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/fapi"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/fapi/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.