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

7.6/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

0 APIs

Company Payments Fintech Merchant ServicesCredit Card ProcessingPayment Gateway Chargebacks Financial-Services

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 7.6/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 3.3 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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: '0.23'
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
tags_raw:
- 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

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