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VotePredictor Elections

Server Details

2026 US election forecasts with a public accuracy record, plus congressional voting records.

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Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
URL
ChatGPT
–
Claude
–

TDQS

A3.7/5.0

Scored across 4 tools

Disambiguation4/5

Each tool targets a distinct query type: chamber-level control outlook, single-race forecast, forecaster track record, and member attributes. The only mild overlap is that member_profile surfaces a member's 2026 race while forecast_race forecasts that same race, but their primary purposes are clearly different.

Naming Consistency4/5

All four names are two-token snake_case compounds following a [subject]_[attribute] pattern (chamber_outlook, forecaster_accuracy, forecast_race, member_profile). The convention is consistent and readable, though it is noun-based rather than a verb_noun action pattern.

Tool Count4/5

Four tools is a tight, well-scoped set for an election-forecasting server, with each tool covering a genuinely different question type. It sits at the lean end, but no tool feels redundant or gratuitous.

Completeness3/5

Core forecasting is covered (chamber outlook, race forecast, forecaster accuracy, member profile), but there are notable gaps: no way to enumerate races, states, or members, and no lookup for polling data or historical results. Agents asking 'what races are there?' or 'show me polls' would hit dead ends.

Available Tools

4 tools
chamber_outlookChamber control outlookA
Read-onlyIdempotent
Inspect

Who is favoured to control the Senate or House after 2026: control probability, expected seats with an 80% range, how far it has moved since January, and the races that have moved most since the current model began (its latest revision).

Inputs: chamber. Returns: url, as_of, chamber, summary, +11 more

forecaster_accuracyForecast accuracy track recordA
Read-onlyIdempotent
Inspect

How accurate each election forecaster, model, prediction market and pollster has been on resolved races, adjusted for how hard each race was. Use this to answer 'whose election forecast should I trust'. Difficulty adjustment matters: on raw scores whoever rated the safest races wins.

Inputs: limit, office. Returns: url, metric, office, entries, +3 more

forecast_raceForecast a 2026 raceA
Read-onlyIdempotent
Inspect

Current VotePredictor forecast for one 2026 US election: win probability, predicted margin, whether it comes from polls or fundamentals, how far it has moved this cycle, and the candidates. Accepts a state name or code ('Ohio', 'OH') or a district ('CA-12'). Returns an explicit refusal for races where a candidate has left the ballot and no forecast is published.

Inputs: where (required), office. Returns: url, as_of, office, rating, +18 more

member_profileMember of CongressB
Read-onlyIdempotent
Inspect

A member of Congress by name or bioguide id: party, state, ideology score, reported net worth from financial disclosures, and the 2026 race for their seat.

Inputs: who (required). Returns: url, name, found, party, +9 more

Tool Schema Changelog

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