Strale

Trust and quality infrastructure for AI agents.

strale MCP server

npm npm PyPI License: MIT strale.dev

What is Strale

Strale is a capability marketplace for AI agents. Agents call strale.do() at runtime to access 290+ verified capabilities — company lookups, compliance checks, financial validation, Web3 security, and more — plus 100 bundled solutions for multi-step workflows like full KYB checks or company due diligence. No hardcoded integrations or credential management.

Every capability is continuously tested and assigned a Strale Quality Score (SQS): a 0-100 confidence score derived from two independent profiles — a Quality Profile (code correctness, schema compliance, error handling, edge cases) and a Reliability Profile (current availability, rolling success, upstream health, latency) — combined via a published matrix. Agents get reliable, scored tools. You get observability into what your agent is actually doing.

Quick Start: MCP Server

Recommended: Streamable HTTP (remote, no install)

{
  "mcpServers": {
    "strale": {
      "type": "streamableHttp",
      "url": "https://api.strale.io/mcp",
      "headers": {
        "Authorization": "Bearer sk_live_your_key_here"
      }
    }
  }
}

No installation required. Works with Claude Desktop, Claude Code, Cursor, and any MCP client supporting Streamable HTTP.

Local (stdio)

{
  "mcpServers": {
    "strale": {
      "command": "npx",
      "args": ["-y", "strale-mcp"],
      "env": {
        "STRALE_API_KEY": "your_api_key"
      }
    }
  }
}

Five capabilities (email-validate, dns-lookup, json-repair, url-to-markdown, iban-validate) are available without an API key. Get a key and €2 free credits at strale.dev.

Quick Start: TypeScript SDK

npm install straleio

import Strale from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY });

const result = await strale.do("eu-vat-validate", { vat_number: "SE556000000001" });
console.log(result);

Quick Start: Python SDK

pip install straleio

from straleio import Strale

strale = Strale(api_key="your_api_key")
result = strale.do("eu-vat-validate", {"vat_number": "SE556000000001"})

Packages

Package	Registry	Description
strale-mcp	npm	MCP server — 290+ capabilities via Claude, Cursor, any MCP host
straleio	npm	TypeScript/JavaScript SDK
straleio	PyPI	Python SDK
langchain-strale	PyPI	LangChain toolkit — 250+ tools via StraleToolkit
crewai-strale	PyPI	CrewAI integration — drop-in BaseTools for agents
strale-semantic-kernel	npm	Semantic Kernel plugin for .NET and TypeScript agents
composio-strale	PyPI	Composio integration — 250+ tools as Composio custom actions

Web3

17 Web3 capabilities and 9 bundled solutions for on-chain agents: wallet risk scoring (GoPlus), token honeypot detection, ENS resolution, DeFi protocol TVL and fees (DeFi Llama), gas oracle, EU MiCA VASP verification (ESMA register), and market sentiment. All available via the x402 payment protocol — pay per call with USDC on Base mainnet, no signup required.

GET https://api.strale.io/x402/catalog

Quality Scoring (SQS)

Every capability has a Strale Quality Score (SQS) from 0 to 100, built on a dual-profile model:

• Quality Profile (QP): Measures code-level quality across four factors — correctness (50%), schema compliance (31%), error handling (13%), and edge case coverage (6%). Upstream failures are excluded.
• Reliability Profile (RP): Measures operational dependability — upstream availability, latency consistency, error recovery, and degradation handling. Factor weights vary by capability type (API-dependent, algorithmic, mixed).

The two profiles combine via a published 5x5 matrix with interpolation into the final SQS score. Grades run A through E (A >= 90, B >= 75, C >= 50, D >= 25, E < 25), computed over a recency-weighted rolling 10-run window.

Scores are public. Check any capability:

GET https://api.strale.io/v1/quality/eu-vat-validate

Agents can set a min_sqs threshold on any POST /v1/do call — requests are rejected if the capability's current score falls below the threshold.

Links

• strale.dev — Homepage and sign-up
• strale.dev/docs — API reference
• strale.dev/pricing — Pricing
• strale.dev/quality — Quality methodology
• scan.strale.io — Beacon (free agent-readiness scanner)
• api.strale.io/mcp — MCP endpoint (Streamable HTTP)
• Examples — copy-paste examples for every integration

Agent Skills & Code Examples

Teach your AI coding agent how to use Strale:

• Agent Skills — SKILL.md files for Claude Code, Cursor, Copilot, and Codex. Copy skills/strale/ into your project's .claude/skills/, .github/skills/, or .cursor/skills/ directory.

Code examples:

• Verify a company with Strale (Python)
• Validate IBANs — free, no API key (Python)
• Build an agent with Strale (TypeScript)
• Connect Strale to Claude (setup guide)

Strale is the trust layer for AI agents.

IDE Rules for Safe Data Handling

Drop these files into your project to give your coding agent security guidance for trust-sensitive data (IBANs, company registries, sanctions, PII):

• Cursor: Copy docs/ide-rules/strale-compliance.mdc to .cursor/rules/
• Windsurf: Copy docs/ide-rules/strale-compliance.windsurfrules to your project root, or into .windsurf/rules/ as a .md file
• Claude Code: Copy the snippet from docs/claude-md-snippet.md into your project's CLAUDE.md

These rules prevent the most common vibe-coding vulnerabilities: client-side IBAN validation, hardcoded API keys, missing provenance metadata, and direct registry scraping. Free-tier endpoints are referenced as safe defaults that require no API key.

License

MIT