Marine MCP — wraps marine-api.open-meteo.com (free, no auth)
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Scored across 33 tools
Descriptions do a good job steering between tools, but there is real overlap: ask_pipeworx, ask_pipeworx_beta (explicitly identical to the stable router today), ask_pipeworx_grounded, and deep_research all answer questions via the same 5,961-tool routing layer. Similarly entity_profile, compare_entities, recent_changes, and resolve_entity form a cluster of entity-research tools, and polymarket_edges vs polymarket_arbitrage both surface opportunity lists. Boundaries are documented but an agent still has to reason carefully about which entry point to use.
The vast majority of names are snake_case, and most follow a verb_noun shape (ask_pipeworx, get_current_waves, resolve_entity, validate_claim, search_within). Minor deviations exist where names are noun-only (entity_profile, recent_alerts, recent_changes, ai_visibility_check) or prefixed (pipeworx_feedback, polymarket_edges), but the convention is still broadly predictable.
33 tools is heavy for a single server surface. While the server is a broad multi-source data gateway, this volume forces the agent to choose among many overlapping research entry points (four ask/research routers, four polymarket analysis tools, three memory tools) and pushes past the point where each tool clearly earns its place.
The surface covers the main lifecycle areas well: memory (remember/recall/forget), subscriptions (subscribe/list/unsubscribe/recent_alerts), entity research, claim validation, and a thorough Polymarket suite. Gaps are minor — subscriptions have no update operation, and the marine/wave domain only offers current + forecast waves (no tides, water temperature, or currents), but these are workaroundable.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
bet_research2 fields changedInput schema / examplesPrevious value: -[
- {
- "market": "will-bitcoin-reach-100k-in-july-2026"
- },
- {
- "market": "https://polymarket.com/event/will-bitcoin-hit-150k-by-june-30-2026"
- }
-]New value: +[
+ {
+ "market": "will-kristi-noem-win-the-2028-republican-presidential-nomination"
+ },
+ {
+ "market": "https://polymarket.com/event/will-kristi-noem-win-the-2028-republican-presidential-nomination"
+ }
+]Input schema / properties / market / descriptionPrevious value: -"Polymarket slug (\"will-bitcoin-hit-150k-by-june-30-2026\"), full URL (\"https://polymarket.com/event/...\"), or question text (\"Will Bitcoin hit $150k by June 30?\")"New value: +"Polymarket slug (\"will-kristi-noem-win-the-2028-republican-presidential-nomination\"), full URL (\"https://polymarket.com/event/...\"), or question text (\"Will Bitcoin hit $150k?\"). Dated slugs stop resolving once they settle — Polymarket de-indexes resolved markets — so prefer an undated one."polymarket_kalshi_spread2 fields changedInput schema / examplesPrevious value: -[
- {
- "topic": "fed"
- },
- {
- "topic": "btc"
- }
-]New value: +[
+ {
+ "topic": "fed"
+ },
+ {
+ "topic": "btc"
+ },
+ {
+ "topic": "bitcoin"
+ },
+ {
+ "topic": "fed rate decision"
+ }
+]Input schema / properties / topic / descriptionPrevious value: -"Pre-mapped: fed | btc | cpi | gdp | sp500 | recession | next_pope | next_uk_pm | next_israel_pm | 2028_president"New value: +"Subject to compare. Canonical keys: fed | btc | eth | cpi | gdp | sp500 | recession | next_pope | next_uk_pm | next_israel_pm | 2028_president — but aliases and keywords resolve too (\"bitcoin\", \"fed rate decision\", \"ethereum\", \"inflation\", \"s&p 500\", \"us recession\", \"next pope\", \"2028 election\"). Check resolution.topic_matched_by in the response: \"exact\"/\"alias\" is a curated pairing, \"phrase\"/\"token\" is a keyword guess."entity_profile3 fields changedInput schema / properties / type / descriptionPrevious value: -"Entity type. Only \"company\" supported today; person/place coming soon."New value: +"\"company\" or \"ticker\" — both are accepted and behave identically; `value` can be a ticker, CIK, or company name either way. person/place coming soon."Input schema / properties / type / enumPrevious value: -[
- "company"
-]New value: +[
+ "company",
+ "ticker"
+]Input schema / properties / value / descriptionPrevious value: -"Ticker (e.g., \"AAPL\") or zero-padded CIK (e.g., \"0000320193\"). Names not supported — use resolve_entity first if you only have a name."New value: +"Ticker (e.g., \"AAPL\"), zero-padded CIK (e.g., \"0000320193\"), or company name (e.g., \"Moderna\") — names resolve via SEC EDGAR company-name match."resolve_entity1 field changedInput schema / properties / value / descriptionPrevious value: -"For company: ticker (AAPL), CIK (0000320193), or name. For drug: brand or generic name (e.g., \"ozempic\", \"metformin\")."New value: +"For company: ticker (AAPL), CIK (0000320193), or name. For drug: brand or generic name (e.g., \"ozempic\", \"metformin\"). Pass the ENTITY NAME ONLY — for a bond that is the ISSUER exactly as printed (\"NEW YORK ST DORM AUTH\"), never the question's full noun phrase (\"NEW YORK ST DORM AUTH revenue bonds\"): the FIGI lookup matches instrument names, so trailing security-class words match nothing."Open-Meteo MCP — weather forecast + historical reanalysis + sister APIs
Climate MCP — wraps Open-Meteo Climate API (free, no auth)
Flood MCP — wraps Open-Meteo Flood API (free, no auth)
Air Quality MCP — wraps air-quality-api.open-meteo.com (free, no auth)
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