niche · 0.5

Merchant Services

Score 18.5 / 100 29 providers 6 APIs Search apis.io →

Providers using this tag (29)

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

Strong 1 Solid coverage with minor gaps
HelcimPaymentsCanadaPayment GatewayPayment Processing6 APIs57.7
Developing 9 Usable, with meaningful gaps to close
TamaraBNPLBuy Now Pay LaterFintechPayments11 APIs48.9Suncorp BankFinancialBanksOpen BankingCDR8 APIs46.7MonerisFinancial-ServicesPaymentsPayment ProcessingCard Payments10 APIs46.6PaystonePaymentsCanadaPayment ProcessingAcquiring1 API46.3Tribe PaymentsPaymentsUnited KingdomIssuer ProcessorCard Issuing15 APIs45.8TeyaCompanyPaymentsPayment ProcessingCard Acquiring16 APIs45.3CoinGateCryptocurrencyPaymentsPayment GatewayCrypto5 APIs44.5ZettlePoint-of-SalePaymentsInventoryFinance8 APIs44.4Commonwealth BankFinancialBanksConsumer BankingBusiness Banking25 APIs44.0
Thin 8 Limited public surface area
Till PaymentsPaymentsAustraliaPayment GatewayPayment Processing4 APIs37.8PoyntCompanyConsumerPaymentsPoint-of-Sale1 API37.2QuickBooks OnlineAccountingBookkeepingInvoicingSmall Business2 APIs34.7FaveCompanyPaymentsFintechQR Payments2 APIs33.5Total System ServicesPaymentsPayment ProcessingCard Issuing10 APIs32.3ZellerPaymentsAustraliaPayment GatewayPayment Processing3 APIs32.2ZipBNPLBuy Now Pay LaterDigital WalletPayments3 APIs30.1Deluxe CorporationPaymentsCard ProcessingACH4 APIs26.4
Emerging 4 Early or largely undocumented
Ant GroupCompanyTechnologyPaymentsFintech1 API26.0RomitCompanyPaymentsFintechDigital Wallet9 APIs16.1GreenSkyCompanyFintechConsumer FinancingPoint of Sale Lending14.5PactoCompanyPaymentsPoint-of-SaleFintech11.2
Minimal 7 Almost no public developer surface
PollinateCompanyPaymentsMerchant Acquiring7.6TransFSCompanyPaymentsFintech7.699BillCompanyFintechPaymentsPayment Processing6.3First Data (Fiserv)PaymentsFinancial-ServicesTransaction Processing1 API6.1JumiaE-CommerceMarketplaceAfricaPan-African5.1littlefishCompanyFinancial-ServicesPayments1.5Eliance CorporationCompanyPaymentsPayment ProcessingE-Commerce0.1

APIs with this tag (6)

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 4 Usable, with meaningful gaps to close
Suncorp Bank Gateway (Mastercard) Payments APISuncorp Bank's merchant payment gateway, a Suncorp-branded instance of Mastercard Payment Gateway Services ...46.7Acquiring Processor - Acquirer API (ACAPI)Acquirer API (ACAPI, v1) for Tribe's acquiring-processor platform, covering acquirer-side transaction proce...45.8CommBank Merchant PaymentsCommBank provides merchant payment acceptance through EFTPOS terminals, eCommerce gateways, BPAY merchant s...44.0CommBank Payment Gateway APICommBank's merchant Payment Gateway exposes a hosted REST API for online card acceptance, authorisation, ca...44.0
Thin 1 Limited public surface area
QuickBooks Payments APIREST API for processing card and bank payments, tokenizing payment methods, creating charges and refunds, a...34.7
Minimal 1 Almost no public developer surface
Fiserv Developer (First Data Legacy)Following the Fiserv merger, legacy First Data API products are now hosted on the Fiserv developer portal. ...6.1

Score breakdown

Frequency
41.2
log-scaled weighted occurrences
Breadth
0.8
spread across providers
Quality lift
35.7
mean composite of providers using it
Cohesion
5.5
strength of nearest seed neighbor

Related tags

Payment Processing 12 co-occurrences Acquiring 6 co-occurrences Payment Gateway 8 co-occurrences Refunds 8 co-occurrences Point-of-Sale 8 co-occurrences Payments 28 co-occurrences Transaction 6 co-occurrences Fintech 17 co-occurrences

Where this tag comes from

Provider tag25
Api tag6

Cohort brief

Auto-generated

The 29 providers in the APIs.io catalog tagged Merchant Services, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
29
all scored
Mean Kin Score
28.8
+8.1 vs catalog 20.7
Mean Agent Readiness
20.1
+10.4 vs catalog 9.7
Spread
0.1–57.7
median 32.3 · σ 17.1
How the 29 split by band
Exemplar 0Strong 1Developing 9Thin 8Emerging 4Minimal 7
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 28.9 17.5 +11.4 29
Developer Ergonomics 29.1 17.9 +11.2 29
Discoverability 68.1 60.4 +7.7 29
Contract Governance 12.5 6.4 +6.1 29
Operational Transparency 16.6 11.3 +5.3 29
Access Clarity 23.1 22.3 +0.8 29

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) 38% 16% +22
MCP server (first-party) 7% 7% 0
Agent Skills 0% 0% 0
OAuth scopes 24% 9% +15
Security 97% 88% +9
Arazzo workflows 10% 2% +8
Governance rules 10% 13% -3

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 Helcim 57.7
  2. 2 Tamara 48.9
  3. 3 Suncorp Bank 46.7
  4. 4 Moneris 46.6
  5. 5 Paystone 46.3
  6. 6 Tribe Payments 45.8
  7. 7 Teya 45.3
  8. 8 CoinGate 44.5
  9. 9 Zettle 44.4
  10. 10 Commonwealth Bank 44
Top by Agent Readiness
  1. 1 Moneris 52.6
  2. 2 Helcim 39.7
  3. 3 Teya 37.2
  4. 4 Suncorp Bank 36.5
  5. 5 Tribe Payments 35.7
  6. 6 Till Payments 35.4
  7. 7 Zettle 34.6
  8. 8 Deluxe Corporation 32.8
  9. 9 Tamara 32.4
  10. 10 Paystone 30
All 29 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.

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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

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The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/merchant-services/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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