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Fintech
API
B3 Data
Credit Analysis
Stark - Sinatra Credit Analysis API
A product and API layer that helped Stark analysts evaluate private companies using CNPJ lookup, B3 comparables, and saved match workflows.
About the Project
We developed the API foundation behind Stark Sinatra, a product designed to help Stark analysts assess companies seeking credit.
The workflow started with a CNPJ search, returned company identification data, and then surfaced a list of public companies on B3 with comparable sector classification, along with relevant financial metrics used in valuation analysis.
We also built the persistence layer that allowed analysts to save selected matches, manually add extra listed comparables when needed, attach observations, and retrieve that analysis later through authorized Stark access.
Key Features
- REST API for CNPJ lookup returning company identification and CNAE data
- Comparable-company discovery based on sector classification and B3-listed companies
- Delivery of financial metrics such as EBITDA, market cap, debt, revenue, and cash for public comparables
- Persistence and retrieval of saved matches, analyst-added companies, and observations
- Support for analyst workflows that combine automated matches with manual judgment
Technologies Used
REST API
JSON
B3 Data
CNAE Mapping
Fintz Infrastructure
Results
Faster
Analyst workflow for company search and confirmation
Structured
Comparable-company selection and valuation support
Persistent
Saved match history per client company
Simpler
Integration layer for Stark Sinatra product workflows