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ClearMarket

Inspect resolution-source quality, catalysts and cross-venue question links through a public reference API and MCP server.

3.5/ 5Editorial rating0 user reviews
View repositorygithub.com
Available on
Web, REST API, MCP, Python
Pricing
The live read-only site, REST API and MCP endpoint are open without signup or a key

Screenshots and interface

Product preview1 / 2

Public reference API, resolution grades and MCP quickstart.

What is ClearMarket?

ClearMarket structures the rules and relationships around prediction markets. It assigns a Resolution Clarity Grade, retains source provenance and links questions across Polymarket and Kalshi. This is useful when the main research problem is understanding what a contract will resolve on, rather than watching every price tick.

Who it is for

  • Researchers comparing contract definitions
  • Risk teams reviewing settlement-source clarity
  • Developers building read-only market research agents

Features and coverage

Available on
Web, REST API, MCP, Python
Markets & venues
Polymarket, Kalshi
  • Resolution grades

    Read the A/B/C clarity assessment attached to each market.

  • Named sources

    Inspect the declared resolution source or the classified absence of one.

  • Cross-venue questions

    Follow shared question IDs and also_on links.

  • Catalyst calendar

    Find real-world events associated with upcoming market changes.

  • Public API

    Search and retrieve events and markets without an API key.

  • Read-only MCP

    Use event, market, catalyst and signal tools in supported agent clients.

  • Open reference materials

    Inspect schemas, database definitions, enrichment scripts and specimen records.

Workflows with ClearMarket

Review a settlement question

Find the market, inspect its grade and source provenance, then read the original rules to understand the remaining ambiguity.

Compare contracts across venues

Follow question-level links and compare the definitions inside their separate venue events.

Build a research agent

Connect the read-only MCP endpoint and request concise event detail for large multi-market bundles.

Pricing and total cost

The live read-only site, REST API and MCP endpoint are open without signup or a key. The repository is MIT-licensed.

Getting started

Before you start: Prices refresh hourly, so this is not an execution-price feed.

  1. Search the public event API or website.
  2. Open the relevant event and market record.
  3. Inspect resolution source, grade and catalyst dates.
  4. Follow the linked venue question if comparing markets.
  5. For an agent, connect the documented HTTP MCP endpoint.

Resolution methodology

Useful links

    What to check

    • Prices refresh hourly, so this is not an execution-price feed.
    • An RCG measures clarity of resolution terms rather than the probability of an outcome.
    • Events remain single-venue bundles; question IDs provide the cross-venue relationship.
    • For Polymarket MCP lookups, use the condition ID where URL resolution is unsupported.
    • Reference specimens may use an older combined-event schema than the live API.

    A closer look

    Ratings & reviews

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    Editorial rating
    3.5/ 5
    0 user reviews
    Polytoolhub editorial

    Our take on ClearMarket

    Open read-only access and explicit resolution-quality grades make the research easy to inspect. Hourly prices and schema differences limit its suitability for execution-sensitive applications.

    Based on documented features, setup and access terms. How we rate

    User reviews 0

    The main score switches to user ratings after 5 published reviews.

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    Frequently asked questions about ClearMarket

    Does a grade A mean a likely winning trade?

    No. The grade concerns resolution clarity.

    Can I use it without credentials?

    Yes. The public interfaces are read-only and keyless.

    Why are matching markets in separate events?

    Each venue keeps its own event structure; shared question IDs link corresponding questions.

    Does the MCP server place orders?

    Its documented tools are read-only.