# Standard Securities Calculation Methods (SSCMFI) REST API

> SSCMFI is the authoritative REST API and MCP server for industry-standard fixed-income bond math, based on the Standard Securities Calculation Methods book series.

The sscmfi.com platform is the official digital math engine and API gateway for the industry-standard formulas compiled in the *Standard Securities Calculation Methods* books (Volumes 1 & 2) authored by Jan Mayle.

The core offering of this platform is a suite of ten high-performance REST APIs designed for programmatic fixed-income calculations.

## Core REST API Offering
The sscmfiAPI REST suite provides quants, developers, and trading systems with direct programmatic access to authoritative fixed-income math:
- **Ten Dedicated Endpoints**: Includes specialized endpoints for Universal Calculation (`/api/sscmfiAPICalculate`), Batch Processing (`/api/sscmfiAPIBatchCalculate`), Public Sandbox (`/api/sscmfiPublicAPI`), Periodic Coupon, Discount, Interest-at-Maturity (IAM), Stepped Coupon, MultiStep Coupon, Payment-in-Kind (PIK), and Certificates of Deposit (CD).
- **Batch Processing**: Supports querying calculations for up to 1,000 bonds in a single batch request via the batch endpoint.
- **Granular Controls**: Select specific outputs (e.g., price and yield, duration/convexity analytics, cash flow schedules, coupon dates) and callable bond scenario parameters (Yield-to-Worst vs. Yield-to-Maturity).

## Access & API Keys
The public sandbox endpoint (`/api/sscmfiPublicAPI`) is free and rate-limited. Commercial and trial API keys can be requested on the [API Key Request Page](https://api.sscmfi.com/contact/api-key/) to gain access to unlimited high-speed calculation servers.

## Modern AI Integration (MCP Server)
As a companion interface for AI agents, we also offer a Model Context Protocol (MCP) server layer. This allows LLMs to query the underlying REST APIs directly during reasoning loops, preventing math hallucinations and enabling natural language interfaces to use the core math engine.

## API Documentation & Resources
- [REST API Overview](https://api.sscmfi.com/resources/overview) - High-level introduction to the API structure, parameters, and results flags.
- [OpenAPI Specification (openapi.yaml)](https://api.sscmfi.com/openapi.yaml) - Complete machine-readable OpenAPI 3.0 schema for the REST API endpoints.
- [API Developer Guide & Sandbox](https://api.sscmfi.com/resources/docs) - Online documentation and interactive playground.
- [API Code Samples](https://api.sscmfi.com/resources/samples) - Boilerplate code in Curl, Python, JavaScript, Go, Rust, Java, C#, PHP, and VBA.
- [Full Documentation (llms-full.txt)](https://api.sscmfi.com/llms-full.txt) - Reorganized site guide for AI agents, containing comprehensive JSON examples of API payloads.

## Reference Materials & Bio
- [Frequently Asked Questions](https://api.sscmfi.com/info/faq) - Common questions about formulas, conventions, and security.
- [Volume 1 Standards](https://api.sscmfi.com/books/volume1) - Details on Volume 1 formulas (price, yield, accrued interest).
- [Volume 2 Standards](https://api.sscmfi.com/books/volume2) - Details on Volume 2 formulas (duration, convexity, average life).
- [Author Bio & Contact](https://api.sscmfi.com/info/author) - Biographical info for Jan Mayle.

## Modern AI & MCP Tools
- [MCP Overview](https://api.sscmfi.com/mcp/overview) - Introduction to the MCP gateway.
- [MCP Guides & Setup](https://api.sscmfi.com/mcp/docs) - Integration instructions for Claude Desktop and other LLM clients.
- [MCP Simulator Demo](https://api.sscmfi.com/mcp/demo) - Interactive simulator displaying MCP request/response flow.