The request asks what to use for a dev facts check, meaning verifying technical claims against live or sourced data. Openkrill's Agent Tools offers an MCP server and HTTP APIs that read live public data for AI assistants 1, and Stackfacts provides sourced, dated facts for choosing software components via an MCP server and API 9. Other candidates are less direct: Promptfoo validates AI application configs and evaluations 8, and GitHub's doublecheck action runs a three-layer claim verificati
- 1
Openkrill Agent Tools (Dev Facts Check)openkrill.appwebsite read, tools not yet checked
Free MCP server and HTTP APIs that read live public data for an AI assistant, with no key or sign-up, offering the Dev Facts Check door.
official:MCP server · Dev Facts Check
- 2
Stackfactsstackfacts.devwebsite read, tools not yet checked
Sourced, dated, reproducible facts on software components (price, free tier, security record), callable as an MCP tool or API before choosing a library or service.
official:MCP server · Stackfacts
- 3
GitHubgithub.comverified and signed
Action doublecheck extracts verifiable claims from AI output and checks them against supporting or contradicting web sources.
official:CLI · github-mcp-serverskill · add-community-extensionskill · git-commitskill · acquire-codebase-knowledge+2,563 community tools built for it
for agents: doublecheck · devops-rollout-plan · chrome-devtools
- 4
Promptfoopromptfoo.devfound in code, not yet checked
AI security and evaluation platform whose actions validate configs and compare providers, useful for checking AI application behaviour.
+3 community tools built for it
for agents: validate_promptfoo_config · get_evaluation_details · compare_providers
Sources
- 1Agent Tools: Free MCP Servers and Data APIs for AI Agentstools.openkrill.app · read 2026-10-29
- 2GitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHubgithub.com · read 2026-10-29
- 8Build Secure AI Applications | Promptfoopromptfoo.dev · read 2026-10-29
- 9Stackfacts: checked facts for choosing software componentsstackfacts.dev · read 2026-10-29
For agents: the 10 actions behind this answer
· Openkrill Dev Facts Check website read, tools not yet checked
Free MCP servers and data APIs for AI agents and developers. Connect job listings, app reviews and CVE checks with no API key.
doublecheck · doublecheck verified and signed
Three-layer verification pipeline for AI output. Extracts verifiable claims, finds supporting or contradicting sources via web search, runs adversarial review for hallucination patterns, and produces a structured verification report with source links for human review.
checking · typing verified and signed
Relic · NewRelic.Agent.Api verified and signed
· PostgreSQL: Developers website read, tools not yet checked
shopify-dev · shopify-dev verified and signed
Search Shopify developer documentation across all APIs. Use only when no API-specific skill applies.
typechecker · pyrefly verified and signed
validate_promptfoo_config · promptfoo found in code, not yet checked
· Stackfacts website read, tools not yet checked
Sourced, dated, reproducible facts for people and AI agents choosing software: price, free tier, idle rules, security record, agent self-setup. No paid placement.
· Rtfd website read, tools not yet checked
Read the Docs is a documentation building and hosting platform aimed at helping developers creating documentation from code with versioned documentation, integrated search, pull request previews and more.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.