TransFS

TransFS (Transparent Financial Services, LLC) is the Chicago fintech that operated FeeFighters, a marketplace helping small and medium-sized businesses compare credit-card processors and reduce merchant-account fees. It also built the Samurai payment gateway, a developer-facing API for tokenizing cards and processing payments. FeeFighters was acquired by Groupon in March 2012 and folded into Groupon Payments / the Merchant Operating System, after which the Samurai gateway API was retired. The feefighters.com domain today operates as a credit-card fee-negotiation and chargeback-management consultancy under the FeeFighters name, promising fee reductions without switching processors; it publishes no public API, developer portal, or machine-readable API definition.

TransFS is profiled on the APIs.io network. Tagged areas include Company, Payments, Fintech, Merchant Services, and Credit Card Processing.

🌐 Visit website 📡 Source on GitHub

13.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyPaymentsFintechMerchant ServicesCredit Card ProcessingPayment GatewayChargebacksFinancial Services

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 13.9/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 4.2 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/transfs: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Crunchbase

Crunchbase

Other 1

Properties that don't map to a standard resource type

Wikipedia

Wikipedia

Source (apis.yml)

aid: transfs
name: TransFS
description: TransFS (Transparent Financial Services, LLC) is the Chicago fintech that operated FeeFighters, a marketplace
  helping small and medium-sized businesses compare credit-card processors and reduce merchant-account fees. It also built
  the Samurai payment gateway, a developer-facing API for tokenizing cards and processing payments. FeeFighters was acquired
  by Groupon in March 2012 and folded into Groupon Payments / the Merchant Operating System, after which the Samurai gateway
  API was retired. The feefighters.com domain today operates as a credit-card fee-negotiation and chargeback-management consultancy
  under the FeeFighters name, promising fee reductions without switching processors; it publishes no public API, developer
  portal, or machine-readable API definition.
url: https://raw.githubusercontent.com/api-evangelist/transfs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
image: https://feefighters.com/favicon.ico
tags:
- Company
- Payments
- Fintech
- Merchant Services
- Credit Card Processing
- Payment Gateway
- Chargebacks
- Financial Services
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/transfs-domain-security.yml
- type: Website
  url: https://feefighters.com
- type: PrivacyPolicy
  url: https://feefighters.com/privacy
- type: TermsOfService
  url: https://feefighters.com/terms
- type: Crunchbase
  url: https://www.crunchbase.com/organization/transparent-financial-services
- type: Wikipedia
  url: https://en.wikipedia.org/wiki/Feefighters
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1