Trust Score API
Evaluate trustworthiness of any domain, URL, wallet, or API. Returns 0-100 score with 5 sub-scores: SSL, DNS, WHOIS, security headers, content. Zero-cost, zero-dependency. The trust layer agents need before interacting with unknown services. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"trust-score": {
"url": "https://trust-score.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://trust-score.api.klymax402.com/api/score" \
-H "Content-Type: application/json" \
-d '{"target":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
trust_score_evaluate | POST | /api/score | $0.02 | Evaluate trust of a domain, URL, wallet address, or API endpoint. Returns composite score 0-100 with grade (A+ to F), verdict (trusted/moderate/suspicious/dangerous), and 5 detailed sub-scores. |
trust_score_batch_compare | POST | /api/batch | $0.03 | Compare trustworthiness of 2-5 targets side by side. Returns all scores ranked from most to least trusted. |
trust_score_evaluate
Use this when you need to check if a domain, website, API endpoint, or crypto wallet is safe to interact with. Returns a composite trust score 0-100 with letter grade (A+ to F), verdict (trusted/moderate/suspicious/dangerous), and 5 sub-scores:
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
target | string | yes | Domain (example.com), full URL (https://api.example.com/v1), wallet address (0x...), or IP address to evaluate |
checks | array | no | Which checks to run. Default: all. Pass a subset like ["ssl","dns"] for faster results (under 2s). Full scan takes 3-8s. |
Example response:
{ compositeScore: 82, grade: "A", verdict: "trusted", subscores: { ssl: { score: 90, ... }, dns: { score: 85, ... }, ... } }
When to use: making payments, sending sensitive data, or trusting any external service. Essential for agent safety.
Not for: SEO analysis (use seo_audit_page), email validation (use email_verify_address), tech stack detection (use website_detect_tech_stack), port scanning (use network_scan_ports).
trust_score_batch_compare
Use this when you need to compare the trustworthiness of multiple domains, URLs, or wallets and pick the safest option. Accepts 2-5 targets and returns trust scores for all, sorted from most to least trusted.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
targets | array | yes | List of 2-5 domains, URLs, or wallet addresses to evaluate and rank |
Not for: single targets (use trust_score_evaluate).
Example agent prompts
- "Check if a domain, website, API endpoint, or crypto wallet is safe to interact with"
- "Compare the trustworthiness of multiple domains, URLs, or wallets and pick the safest option"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT