Credit Card Intelligence API

Deterministic portfolio optimization powered by aggregate spend input and public product economics. Compute renewal decisions, break-even thresholds, and optimal card usage — via REST or MCP.

# Analyze a card portfolio in one call
curl -X POST https://kokofinance.net/api/v1/portfolio/analyze \
  -H "X-API-Key: koko_your_key" \
  -H "Content-Type: application/json" \
  -d '{"cards": [{"card_name": "Chase Sapphire Preferred"}], "params": {"spending": {"dining": 500, "travel": 300}}}'

Card rewards are complex. Most systems treat them as static rules.

Rewards structures vary by category, tier, and issuer — with caps, thresholds, and rotating bonuses that change quarterly.

Benefits change frequently. Sign-up bonuses expire, perks get devalued, and new credits appear mid-cycle.

Annual fees distort true card value. A $695 fee card can be worth keeping or worth canceling depending on spend patterns.

Multi-card portfolios create combinatorial complexity. The best card for dining depends on what other cards you hold.

What You Can Compute

Structured, deterministic outputs for every core credit card decision.

Renewal Intelligence

Should a cardholder keep or cancel? Model the annual fee against estimated rewards and credits to produce a clear verdict.

Break-even Modelling

Compute the exact spending threshold where a card's rewards offset its annual fee. Per-category and portfolio-wide.

Portfolio Optimization

Analyze a full card portfolio. Identify overlap, coverage gaps, and net value across all spending categories.

Category Recommendation

Given a spending category and a portfolio, return the card that maximizes rewards for that transaction.

Card Discovery

Surface cards that fit a user's spend profile. Filter by rewards structure, annual fee, issuer, and category strength.

Card Comparison

Compare two or more cards side by side. Rewards rates, fees, credits, and net value against a given spending pattern.

Privacy-preserving Architecture

No transaction-level data. No bank credentials. Designed for compliance from day one.

Aggregate spend input — Accepts category-level spending totals (e.g., $500/mo dining). No itemized transactions.
No transaction ingestion — We never see, store, or process individual purchases. Your users' data stays with you.
No bank credentials — No Plaid. No screen scraping. No OAuth to financial institutions. Zero integration friction.

Built for Developers

Ship card intelligence into your product in hours, not quarters.

REST APIs — Standard HTTP endpoints with Swagger UI. JSON in, JSON out.
MCP Server — Connect AI agents directly. Works with Claude, Cursor, and custom copilots.
Structured JSON schemas — Typed, predictable responses. Build your UI directly on the output.
Deterministic outputs — Same input, same result. No LLM variance. Audit-friendly and testable.

Built for Modern Financial Systems

Whether you're building a copilot, a banking app, or a fintech tool — card intelligence should be a service, not a spreadsheet.

Financial Co-Pilots & Assistants

Give AI agents structured credit card data they can reason over. MCP-native integration for copilot workflows.

Issuer & Banking Apps

Help cardholders understand their portfolio value, optimize usage, and make informed renewal decisions.

Fintech Tools

Add card intelligence to budgeting, expense management, or financial planning products. No PII required.

Try Intelligence in Card Studio

Analyze a credit card portfolio, evaluate renewal decisions, and test optimization strategies using the same modeling engine that powers the API.

Create a free account to keep track of your cards and revisit your analysis anytime.

Simple Pricing

Start free. Scale when you're ready.

Free

$0

2,000 calls/month

Get Started Free

Pro

$199/mo

30,000 calls/month

See Pricing

Enterprise

Custom

Volume + SLA

Contact Us

Ready to add card intelligence to your platform?

Free tier included. No credit card required.

Get API Key — Free View Documentation