RealWorldAPIs
Evidence-first registry of real-world APIs for AI agents, with verified metadata and comparison.
| Endpoint | https://mcp.realworldapis.com/mcp (streamable-http) |
|---|---|
| Registry version | 3.0.1 |
| Now | 6 tools · grade A (96) · pin ts_b1599936aae86a613dd381256ccfcba1 · protocol 2025-06-18 |
| First / last listed | 2026-10-27 06:59 UTC / 2026-10-27 06:59 UTC |
| Grade over time | 2026-10-27: A (96), 6 tools |
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Tools: find_api_for_task search_apis search_capabilities verify_requirement get_api compare_apis
find_api_for_task | Find the best APIs for a natural-language physical-world task. Use this for open-ended task or outcome-based recommendations; use search_apis when you already know exact filters, get_api for one known API, or compare_apis for known candidates. Returns an authoritative canonical structured_results shortlist plus a best-effort AI comparison restricted to that shortlist. The canonical engine now appl params: task*, requirements, limit |
search_apis | Search the canonical registry when you already know keywords or exact requirements. All supplied filter groups combine with AND logic; array capability filters require every supplied value, and protocol fields match the exact Yes/No/Unknown status, so Unknown never satisfies Yes. Results include each API's capability_summary and direct decision-profile URL. Results are sorted by agent_readiness_sc params: query, categories, capabilities, agent_capabilities, openapi, mcp, a2a, x402, llms_txt, min_readiness, agent_actionable, limit |
search_capabilities | Search the canonical 770-capability Verified/High decision graph directly. Use this when the question is about what an agent can actually do and under what execution conditions: task/capability text, API, category, action type, acted-on object, human approval, physical consequence, irreversibility, sandbox, hardware dependency, access friction or setup. All supplied filter groups combine with AND params: query, api_slugs, categories, primitives, action_types, actionability, object, human_approval, physical_consequence, irreversible_high_consequence, sandbox, hardware_dependency, access_friction, agent_setup, limit |
verify_requirement | Verify whether one specific API can satisfy one exact requirement using the canonical Verified/High capability graph plus linked assertion evidence. Returns YES, NO, PARTIAL or UNKNOWN with matched capability, access/setup prerequisites, approval, safety, reversibility, reliability, coverage and other requested dimensions; direct provider facts remain distinct from inferred policy assertions. Unkn params: api*, requirement*, location |
get_api | Retrieve one canonical API decision profile when you already know its name or slug. The response includes the full Verified/High capability profile with execution, access, approval, reversibility, physical-consequence and evidence fields. Exact slug or exact API name is preferred; a partial identifier is accepted only when it uniquely resolves to one record. params: identifier* |
compare_apis | Compare 2–8 already-known APIs side by side using canonical catalog fields plus capability-graph summary fields such as verified capability count, physical consequences, approval relevance and irreversibility. Use get_api for the full decision profile of one API and search_capabilities for capability-level filtering. No missing value is inferred and Unknown remains Unknown. params: apis*, fields |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.