Fatstack

Paid MCP tools behind one endpoint. Agents pay per call in USDC on Base via x402.

Install

Remote server: your requests and data go to www.fatstack.net. Claude Code: claude mcp add --transport http fatstack https://www.fatstack.net/api/mcp · Claude app: Settings → Connectors → Add custom connector.

What it can do

The tools this server listed when we connected to it, in its own words.

• fatstack__free_demo — **FREE DEMO — $0.00, no wallet, no payment.** First-party tool served by Fatstack itself, not a marketplace listing. Call it to confirm your
• echo__echo_json — $0.001000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• json-schema-validate__json_schema_validate — $0.001000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• html-to-markdown__html_to_markdown — $0.001000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• url-metadata__url_metadata — $0.010000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• csv-to-json__csv_to_json — $0.001000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• text-language-detect__text_language_detect — $0.000500 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• regex-test__regex_test — $0.000500 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• unit-convert__unit_convert — $0.000500 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• cron-explain__cron_explain — $0.000500 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• uuid-batch__uuid_batch — $0.000500 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• markdown-lint__markdown_lint — $0.001000 USDC per call on eip155:8453, paid directly to the provider (0x69ad5fb5de6dcdbd8a025374ab7bb23996a69fd9). Payments are final. Once
• askzephy-quick-scan__sol_audit — $0.005000 USDC per call on eip155:8453, paid directly to the provider (0xf4729bec220090ef08c786e9142898354178771e). Payments are final. Once
• askzephy-quick-scan__sol_quick_scan — $0.005000 USDC per call on eip155:8453, paid directly to the provider (0xf4729bec220090ef08c786e9142898354178771e). Payments are final. Once
• askzephy-quick-scan__google_news_feed — $0.005000 USDC per call on eip155:8453, paid directly to the provider (0xf4729bec220090ef08c786e9142898354178771e). Payments are final. Once

KitScout test notes

Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.

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