emerging · 0.2 capability resourceaction

Payment Processing

Score 22.4 / 100 68 providers +2 via APIs 8 APIs Search apis.io →

Providers using this tag (68)

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

Exemplar 1 Complete, well-documented, and agent-ready
StaxPaymentsMerchant ServicesEmbedded Payments1 API72.4
Strong 6 Solid coverage with minor gaps
FinixCompanyFintechPayments1 API61.9Finix PaymentsCompanyPaymentsPayment Facilitation1 API58.0PayabliCompanyPaymentsEmbedded PaymentsFintech2 APIs56.6ZaiPaymentsAustraliaPayment Gateway4 APIs55.8PaymentsensePaymentsUnited KingdomPayment Gateway4 APIs55.1RainforestCompanyPaymentsEmbedded PaymentsPayment Facilitator7 APIs54.3
Developing 28 Usable, with meaningful gaps to close
ModulrPaymentsUnited KingdomBanking as a ServiceEmbedded Finance1 API53.9DojoPaymentsUnited KingdomPayment Gateway5 APIs53.6VersapayPaymentsCanadaAccounts ReceivableAR Automation2 APIs53.5Amazon Payment CryptographyCryptographyFinancial ServicesPCI1 API52.5HelcimPaymentsCanadaPayment Gateway1 API52.5SpreedlyPaymentsUnited StatesPayment GatewayPayment Orchestration1 API52.4Fat ZebraPaymentsAustraliaPayment Gateway4 APIs52.2ConektaPaymentsCardsCash1 API52.0Pinch PaymentsPaymentsAustraliaPayment Gateway10 APIs51.7Shift4PaymentsUnited StatesPayment Gateway1 API50.4WorldpayPaymentsPayment GatewayTokenization20 APIs49.7Trust PaymentsPaymentsUnited KingdomPayment Gateway2 APIs49.1dLocalPaymentsEmerging MarketsPay-InPayouts4 APIs49.0CardstreamPaymentsUnited KingdomPayment Gateway4 APIs46.9PrimerPaymentsPayment OrchestrationFintech2 APIs46.7CashflowsPaymentsUnited KingdomPayment Gateway4 APIs46.5PayUPaymentsFintechFinancial Services1 API45.8ACI WorldwidePaymentsUnited StatesPayment Gateway5 APIs45.7Duck CreekInsurancePaymentsClaims1 API45.1MontonioCompanyFintechPayments2 APIs43.2PaystonePaymentsCanadaAcquiring1 API43.0OpenNodeBitcoinLightning NetworkPayments1 API42.1TeyaCompanyPaymentsCard Acquiring4 APIs42.0MonerisFinancial ServicesPaymentsCard Payments1 API41.2eWAYPaymentsAustraliaPayment Gateway1 API41.0Tribe PaymentsPaymentsUnited KingdomIssuer ProcessorCard Issuing15 APIs40.8VerifonePaymentsPoint-of-SaleTerminal ManagementE-Commerce7 APIs40.8Form3PaymentsUnited KingdomAccount-to-Account1 API40.3
Thin 17 Limited public surface area
MelioB2B PaymentsAccounts PayableAccounts ReceivableBill Pay1 API38.5PaysendPaymentsUnited KingdomCross-BorderMoney Transfer1 API37.9BankedCompanyPaymentsOpen BankingAccount-to-Account1 API37.8ThreddPaymentsUnited KingdomIssuer ProcessorCard Issuing10 APIs37.8Euronet WorldwidePaymentsUnited StatesCross-Border5 APIs37.7CyberSourcePaymentsFraud PreventionTokenization1 API37.5WorldlinePaymentsAcquiringIssuing9 APIs36.7Mastercard Gateway APICredit CardsGatewaysPayments1 API36.1PoyntCompanyConsumerPaymentsPoint-of-Sale1 API35.4VantivPaymentsE-CommerceFinance2 APIs35.1ECOMMPAYPaymentsUnited KingdomPayment Gateway4 APIs33.0Till PaymentsPaymentsAustraliaPayment Gateway2 APIs32.2takepaymentsPaymentsUnited KingdomPayment Gateway1 API31.8NuveiPaymentsPayment GatewayAcquiring3 APIs31.3ZellerPaymentsAustraliaPayment Gateway3 APIs29.6Total System ServicesPaymentsCard IssuingMerchant Services2 APIs28.5Global PaymentsE-CommercePayment TechnologyPayments1 API26.7
Emerging 8 Early or largely undocumented
Electronic payment Exchange IncCompanyPaymentsMerchant Acquiring1 API26.0NMIPaymentsPayment GatewayTokenization8 APIs25.8StonePaymentsFintechPixBrazil4 APIs20.2AstroPayPaymentsPayoutsWallets20 APIs16.6Heartland Payment SystemsBill PayCard PresentCard Not PresentE-Commerce5 APIs15.6PreciumCompanyFinancial ServicesPayments14.1CorduroCompanyEnterprisePaymentsFintech13.8PactoCompanyPaymentsPoint-of-SaleFintech11.5
Minimal 8 Almost no public developer surface
SalidoCompanyPoint-of-SaleRestaurantHospitality10.799BillCompanyFintechPayments8.2Onramp PaymentsCompanyPaymentsFintechTrucking6.6PCI ComplianceComplianceData ProtectionSecurity5.6TxVia (Google)CompanyFintechPaymentsPrepaid Cards3.4Eliance CorporationCompanyPaymentsE-Commerce1.9Loop CryptoCompanyPaymentsCryptocurrencyStablecoins1 API0.0WePayPaymentsPlatform PaymentsMarketplace0.0

APIs with this tag (8)

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 →

Strong 1 Solid coverage with minor gaps
Mastercard GatewayMastercard Gateway (MPGS) is a payment gateway service that provides secure payment processing, hosted paym...55.7
Developing 4 Usable, with meaningful gaps to close
Duck Creek Payments Orchestrator APIDuck Creek Payments Orchestrator API enables insurance carriers to orchestrate payment workflows including ...45.1Apple Pay Payment Processing APIEndpoints for receiving and processing Apple Pay payment tokens44.5Acquiring Processor - Acquirer API (ACAPI)Acquirer API (ACAPI, v1) for Tribe's acquiring-processor platform, covering acquirer-side transaction proce...40.8Acquiring Processor - Merchant API (MAPI)Merchant API (MAPI, v1) for onboarding and managing merchants on Tribe's acquiring-processor platform. Docu...40.8
Emerging 3 Early or largely undocumented
EPX Payments APIEPX card-not-present and card-present payment processing surface — Hosted Checkout, Hosted Pay Page, Browse...26.0AstroPay Direct Payment APIDirect Payment API for processing local pay-ins via the AstroPay payment processing rail. Supports Brazil a...16.6AstroPay Direct Withdrawal APIDirect Withdrawal API for processing local payouts and withdrawals into bank accounts across Argentina, Bra...16.6

Companies reaching this through an API (2)

These companies publish an API, specification or operation carrying “Payment Processing” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Apple Pay Mastercard

Score breakdown

Frequency
51.7
log-scaled weighted occurrences
Breadth
1.8
spread across providers
Quality lift
45.3
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Where this tag sits

Payments broader

Related tags

Acquiring 20 co-occurrences Payment Gateway 25 co-occurrences Card Payments 14 co-occurrences Merchant Services 13 co-occurrences 3D Secure 12 co-occurrences In-Person Payments 9 co-occurrences Tokenization 22 co-occurrences Merchant Onboarding 8 co-occurrences

Where this tag comes from

Provider tag68
Api tag8
Openapi tag1
Openapi op tag1

Cohort brief

Auto-generated

The 67 providers in the APIs.io catalog tagged Payment Processing, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
67
all scored
Mean Kin Score
37.3
+14.4 vs catalog 22.9
Mean Agent Readiness
25.7
+13.8 vs catalog 11.9
Spread
0–72.4
median 40.8 · σ 16.4
How the 67 split by band
Exemplar 1Strong 6Developing 28Thin 17Emerging 8Minimal 7
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 44.2 23.2 +21 67
Contract Quality 38.2 17.6 +20.6 67
Operational Transparency 26.4 13.7 +12.7 67
Discoverability 65.8 58.1 +7.7 67
Access Clarity 33.7 26.5 +7.2 67
Contract Governance 10.6 6.3 +4.3 67

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) 21% 14% +7
MCP server (first-party) 18% 12% +6
Agent Skills 0% 0% 0
OAuth scopes 15% 11% +4
Security 100% 98% +2
Arazzo workflows 9% 2% +7
Governance rules 18% 14% +4

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 Stax 72.4
  2. 2 Finix 61.9
  3. 3 Finix Payments 58
  4. 4 Payabli 56.6
  5. 5 Zai 55.8
  6. 6 Paymentsense 55.1
  7. 7 Rainforest 54.3
  8. 8 Modulr 53.9
  9. 9 Dojo 53.6
  10. 10 Versapay 53.5
Top by Agent Readiness
  1. 1 Moneris 52.6
  2. 2 Stax 52.3
  3. 3 Shift4 51.4
  4. 4 Payabli 49.9
  5. 5 Modulr 49.7
  6. 6 Worldpay 44.5
  7. 7 Spreedly 44.4
  8. 8 Zai 44.1
  9. 9 Versapay 43.3
  10. 10 Teya 42.2
All 68 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 5 October 2026, across 29093 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

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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

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

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