emerging · 0.8

Payment Processing

Score 23.0 / 100 72 providers 10 APIs Search apis.io →
Variants seen in the corpus: Payment Processingpayment processing

Providers using this tag (72)

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

Exemplar 2 Complete, well-documented, and agent-ready
HighnoteCard IssuingCard AcquiringEmbedded FinanceBanking as a Service7 APIs75.4FinixCompanyFintechPayments19 APIs70.4
Strong 12 Solid coverage with minor gaps
Finix PaymentsCompanyPaymentsPayment Facilitation19 APIs65.8PayabliCompanyPaymentsEmbedded PaymentsFintech33 APIs63.5SpreedlyPaymentsUnited StatesPayment GatewayPayment Orchestration7 APIs60.4PaymentsensePaymentsUnited KingdomPayment Gateway3 APIs59.1ZaiPaymentsAustraliaPayment Gateway4 APIs58.7RainforestCompanyPaymentsEmbedded PaymentsPayment Facilitator23 APIs58.3HelcimPaymentsCanadaPayment Gateway6 APIs57.7ConektaPaymentsCardsCash25 APIs56.3Fat ZebraPaymentsAustraliaPayment Gateway4 APIs56.2VersapayPaymentsCanadaAccounts ReceivableAR Automation2 APIs56.2Shift4PaymentsUnited StatesPayment Gateway11 APIs55.2Pinch PaymentsPaymentsAustraliaPayment Gateway10 APIs55.0
Developing 29 Usable, with meaningful gaps to close
Amazon Payment CryptographyCryptographyFinancial-ServicesPCI20 APIs53.6Trust PaymentsPaymentsUnited KingdomPayment Gateway2 APIs52.8DojoPaymentsUnited KingdomPayment Gateway5 APIs52.1PrimerPaymentsPayment OrchestrationFintech5 APIs50.5CardstreamPaymentsUnited KingdomPayment Gateway4 APIs50.3CashflowsPaymentsUnited KingdomPayment Gateway4 APIs49.7ACI WorldwidePaymentsUnited StatesPayment Gateway5 APIs49.6ModulrPaymentsUnited KingdomBanking as a ServiceEmbedded Finance9 APIs48.7SoFiPersonal FinanceBankingLendingStudent Loans4 APIs48.6Form3PaymentsUnited KingdomAccount-to-Account7 APIs48.4MonerisFinancial-ServicesPaymentsCard Payments10 APIs46.6WorldpayPaymentsPayment GatewayTokenization46 APIs46.4PaystonePaymentsCanadaAcquiring1 API46.3MastercardCredit CardsDigital IdentityFinancial-ServicesFraud Detection249 APIs46.2OpenNodeBitcoinLightning NetworkPayments13 APIs46.1Tribe PaymentsPaymentsUnited KingdomIssuer ProcessorCard Issuing15 APIs45.8PayUPaymentsFintechFinancial-Services18 APIs45.3TeyaCompanyPaymentsCard Acquiring16 APIs45.3MontonioCompanyFintechPayments2 APIs44.6Apple PayAppleContactless PaymentsDigital WalletE-Commerce5 APIs43.9eWAYPaymentsAustraliaPayment Gateway1 API43.8duck-creek9 APIs43.2ThreddPaymentsUnited KingdomIssuer ProcessorCard Issuing10 APIs41.7VerifonePaymentsPoint-of-SaleTerminal ManagementE-Commerce27 APIs40.9PaysendPaymentsUnited KingdomCross-BorderMoney Transfer1 API40.5Euronet WorldwidePaymentsUnited StatesCross-Border6 APIs40.4CyberSourcePaymentsFraud ManagementTokenization84 APIs40.3BankedCompanyPaymentsOpen BankingAccount-to-Account1 API39.6MelioB2B PaymentsAccounts PayableAccounts ReceivableBill Pay1 API39.6
Thin 15 Limited public surface area
dLocalPaymentsEmerging MarketsPayinsPayouts17 APIs38.1VantivPaymentsE-CommerceFinance10 APIs37.9Till PaymentsPaymentsAustraliaPayment Gateway4 APIs37.8PoyntCompanyConsumerPaymentsPoint-of-Sale1 API37.2takepaymentsPaymentsUnited KingdomPayment Gateway1 API35.1PaymentusPaymentsUnited StatesBill PaymentsElectronic Bill Presentment2 APIs34.5ECOMMPAYPaymentsUnited KingdomPayment Gateway4 APIs34.3WorldlinePaymentsAcquiringIssuing79 APIs33.6Total System ServicesPaymentsCard IssuingMerchant Services10 APIs32.3ZellerPaymentsAustraliaPayment Gateway3 APIs32.2NuveiPaymentsPayment GatewayAcquiring11 APIs31.7Mastercard Gateway APICredit CardsGatewayPayments2 APIs31.3Loop CryptoCompanyPaymentsCryptocurrencyStablecoins1 API30.6Global PaymentsE-CommercePayment TechnologyPayments5 APIs28.8Electronic payment Exchange IncCompanyPaymentsMerchant Acquiring1 API26.4
Emerging 7 Early or largely undocumented
NMIPaymentsPayment GatewayTokenization8 APIs24.0StonePaymentsFintechPixBrazil4 APIs19.8AstroPayPaymentsPayoutsWallets20 APIs16.1CorduroCompanyEnterprisePaymentsFintech14.5PreciumCompanyFinancial-ServicesPayments13.8Heartland Payment SystemsBill PayCard PresentCard Not PresentE-Commerce5 APIs12.2PactoCompanyPaymentsPoint-of-SaleFintech11.2
Minimal 7 Almost no public developer surface
SalidoCompanyPoint-of-SaleRestaurantHospitality10.499BillCompanyFintechPayments6.3Onramp PaymentsCompanyPaymentsFintechTrucking5.9PCI ComplianceComplianceData ProtectionSecurity4.4TxVia (Google)CompanyFintechPaymentsPrepaid Cards1.5WePayPaymentsPlatform PaymentsMarketplaces1.5Eliance CorporationCompanyPaymentsE-Commerce0.1

APIs with this tag (10)

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 →

Exemplar 1 Complete, well-documented, and agent-ready
Highnote Acquiring APIAccept and process payments as a merchant acquirer through the single GraphQL endpoint. Authorize, capture,...75.4
Developing 6 Usable, with meaningful gaps to close
SoFi Tech Solutions Platform APISoFi Tech Solutions (formerly Galileo Financial Technologies, a SoFi company) is SoFi's B2B fintech platfor...48.6Mastercard GatewayMastercard Gateway (MPGS) is a payment gateway service that provides secure payment processing, hosted paym...46.2Acquiring Processor - Acquirer API (ACAPI)Acquirer API (ACAPI, v1) for Tribe's acquiring-processor platform, covering acquirer-side transaction proce...45.8Acquiring Processor - Merchant API (MAPI)Merchant API (MAPI, v1) for onboarding and managing merchants on Tribe's acquiring-processor platform. Docu...45.8Apple Pay Payment Processing APIEndpoints for receiving and processing Apple Pay payment tokens43.9Duck Creek Payments Orchestrator APIDuck Creek Payments Orchestrator API enables insurance carriers to orchestrate payment workflows including ...43.2
Thin 1 Limited public surface area
EPX Payments APIEPX card-not-present and card-present payment processing surface — Hosted Checkout, Hosted Pay Page, Browse...26.4
Emerging 2 Early or largely undocumented
AstroPay Direct Payment APIDirect Payment API for processing local pay-ins via the AstroPay payment processing rail. Supports Brazil a...16.1AstroPay Direct Withdrawal APIDirect Withdrawal API for processing local payouts and withdrawals into bank accounts across Argentina, Bra...16.1

Score breakdown

Frequency
52.1
log-scaled weighted occurrences
Breadth
2.0
spread across providers
Quality lift
47.5
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Acquiring 20 co-occurrences Payment Gateway 26 co-occurrences Card Payments 15 co-occurrences 3D Secure 12 co-occurrences Merchant Services 12 co-occurrences Tokenization 22 co-occurrences In-Person Payments 9 co-occurrences Merchant Onboarding 7 co-occurrences

Where this tag comes from

Provider tag67
Api tag10
Openapi tag1
Openapi op tag1

Cohort brief

Auto-generated

The 72 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
72
all scored
Mean Kin Score
39.2
+18.5 vs catalog 20.7
Mean Agent Readiness
24.3
+14.6 vs catalog 9.7
Spread
0.1–75.4
median 42.5 · σ 17.4
How the 72 split by band
Exemplar 2Strong 12Developing 29Thin 15Emerging 7Minimal 7
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 42.4 17.9 +24.5 72
Contract Quality 41.8 17.5 +24.3 72
Operational Transparency 25.1 11.3 +13.8 72
Discoverability 72.3 60.4 +11.9 72
Access Clarity 32.4 22.3 +10.1 72
Contract Governance 14.5 6.4 +8.1 72

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) 46% 16% +30
MCP server (first-party) 13% 7% +6
Agent Skills 0% 0% 0
OAuth scopes 15% 9% +6
Security 99% 88% +11
Arazzo workflows 7% 2% +5
Governance rules 19% 13% +6

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 Highnote 75.4
  2. 2 Finix 70.4
  3. 3 Finix Payments 65.8
  4. 4 Payabli 63.5
  5. 5 Spreedly 60.4
  6. 6 Paymentsense 59.1
  7. 7 Zai 58.7
  8. 8 Rainforest 58.3
  9. 9 Helcim 57.7
  10. 10 Conekta 56.3
Top by Agent Readiness
  1. 1 Moneris 52.6
  2. 2 Shift4 51.4
  3. 3 Payabli 50.3
  4. 4 Modulr 48
  5. 5 Worldpay 44.8
  6. 6 Spreedly 42.6
  7. 7 Rainforest 41.5
  8. 8 Helcim 39.7
  9. 9 Versapay 39
  10. 10 Finix 38.8
All 72 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/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"

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.