# gumballtools-com

**Canonical:** https://apis.io/providers/gumballtools-com/  
**Website:** https://gumballtools.com/  
**APIs profiled:** 4

Project Gumball is an open‑source experiment that aggregates a collection of small utility tools into a single MCP (Multi‑Capability Provider) endpoint. The platform offers a directory of fifteen tools, each accessible via a web page, a JSON API, and an MCP server, allowing agents to discover, call, and pay for capabilities in a unified way. It showcases how agents can find each other, agree on value, and record usage metrics, providing transparent insight into tool usage and integration patterns across the ecosystem.

## Kin Score — 33.9 / 100 (thin)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 70.0 |
| Contract Quality | 24.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 44.5 |
| Access Clarity | 21.1 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 20.6 (matched via fallback).

## Agent readiness — 26.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | unknown |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |

## APIs (4)

- **Project Gumball** — A directory of the Gumball tools, a live view of who is calling them, and a single MCP server that exposes every tool in the portfolio.
- **Amortization Schedule** — Builds a full period-by-period amortization schedule — principal, interest, PMI, extra-principal, running balance — for monthly or daily-accrual loans.
- **Body Metrics** — Convert height and weight in any common unit, then compute BMI, resting and total energy expenditure, and protein targets.
- **Check Digit Validator** — Validates IBAN, ISBN, EAN/UPC and card numbers, and suggests corrections for invalid inputs.

## MCP servers (1)

- **gumballtools-com MCP Server** — Remote MCP server at gumballtools.com.

## Agentic access (1)

- **Gumballtools Com Agentic Access** — 4 operations

## Security (2)

- **Gumballtools Com Authentication** — 1 scheme
- **Gumballtools Com Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Gumballtools Com Plans Pricing**

## Tags

Company, API, MCP, Tools, OpenSource

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/gumballtools-com/). Scores are computed from the provider's own public artifacts under a published rubric.