# Fatstack

**Canonical:** https://apis.io/providers/fatstack-net/  
**Website:** https://fatstack.net/  
**APIs profiled:** 1

Fatstack provides a marketplace of pay‑per‑call tools for AI agents, offering API and MCP tools that charge per request in USDC on the Base blockchain. Agents can discover tools, pay per call without accounts or API keys, and receive results directly. The platform emphasizes on‑chain payments, no custodial holdings, and transparent pricing, with a catalog of utilities like HTML‑to‑JSON, CSV‑to‑JSON, and cron expression explanations. It aims to simplify integration for AI agents while ensuring secure, decentralized transactions.

## Kin Score — 15.0 / 100 (emerging)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 56.7 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 35.7 |
| Access Clarity | 17.0 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 7.3 (matched via fallback).

## Agent readiness — 3.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| 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 |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **Payments API** — API for managing payments on Fatstack platform.

## MCP servers (1)

- **Fatstack MCP Server** — Remote MCP server at www.fatstack.net.

## Security (1)

- **Fatstack Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Artificial Intelligence, Marketplace, Pay-per-call, Blockchain, Tools

---

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