CoinRithm/coinrithm-agent-trading

Official

by CoinRithm

Overview Schema Source Related Servers Discussions Admin

Python

Hybrid

Discover prediction markets

discover_pm_markets

Read-only

Find open, quote-ready prediction markets on Kalshi and Polymarket. Filter by source or search to identify tradeable opportunities with volume, liquidity, and eligibility data.

Instructions

Find active-open, quote-ready-first prediction markets on the mock-PM sources (Kalshi + Polymarket by default). Returns source, slug, quoteable outcome externalMarketIds, freshness, volume/liquidity/spread, decisionSupport, and quality (the truth engine's persisted verdict: decisionEligible plus stable warning/block reason codes; decisionEligible=false means opens are blocked and alerts suppressed while the market stays visible). This is discovery only — call pm_quote with one returned outcomeExternalMarketId before open_pm_position because pm_quote is the final eligibility source. Paper trading only — virtual funds (50,000 mUSD). Not financial advice. Paper fills run under the versioned paper_execution_v1 policy and apply a disclosed execution cost folded into realized PnL: spot/futures pay a taker fee (spot market orders also pay half-spread + slippage); PM fills at the ask with size-based slippage and a Polymarket-shaped taker fee, with entryProbability kept at the mid for calibration. See the executionModel in quote/trade results — a rehearsal cost, not an exchange fill guarantee.

Input Schema

TableJSON Schema

Name	Required	Description
`q`	No	Optional search text (title, outcome, topic, or related coin).
`sort`	No	Prediction-market sort (default best).
`limit`	No	Max rows (1-50, default 20).
`offset`	No	Pagination offset (default 0).
`source`	No	Source filter (default all = Kalshi + Polymarket).
`agentTrace`	No	Optional private trace metadata stored in the caller's ledger.

Output Schema

TableJSON Schema

Name	Required	Description
`ok`	Yes	True when CoinRithm returned a successful 2xx response.
`body`	No	Parsed CoinRithm response body, or raw text when the response is not JSON.
`httpStatus`	Yes	HTTP status returned by CoinRithm, or 0 for network errors.
`ledgerStatus`	No	Ledger write status header returned by CoinRithm, when present.
`ledgerEventId`	No	Private AgentActionEvent id returned by /api/agent/*, when present.

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv0.1.8Jun 12, 2026

addedInput schema / properties / agentTrace

Added value: +{
+  "additionalProperties": false,
+  "description": "Optional private trace metadata stored in the caller's ledger.",
+  "properties": {
+    "confidence": {
+      "description": "Optional confidence score from 0 to 1.",
+      "maximum": 1,
+      "minimum": 0,
+      "type": "number"
+    },
+    "decisionId": {
+      "description": "Agent decision id for quote/write attribution.",
+      "minLength": 1,
+      "type": "string"
+    },
+    "rationaleSummary": {
+      "description": "Optional concise rationale summary. Do not include chain-of-thought, secrets, or account identity.",
+      "maxLength": 1200,
+      "minLength": 1,
+      "type": "string"
+    },
+    "runId": {
+      "description": "Agent run id for grouping.",
+      "minLength": 1,
+      "type": "string"
+    },
+    "strategyLabel": {
+      "description": "Short strategy label, self-reported by the caller.",
+      "maxLength": 120,
+      "minLength": 1,
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / ledgerEventId

Added value: +{
+  "description": "Private AgentActionEvent id returned by /api/agent/*, when present.",
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / ledgerStatus

Added value: +{
+  "description": "Ledger write status header returned by CoinRithm, when present.",
+  "type": [
+    "string",
+    "null"
+  ]
+}

Changed1 schema field changedv0.1.5Jun 10, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "body": {
+      "description": "Parsed CoinRithm response body, or raw text when the response is not JSON."
+    },
+    "httpStatus": {
+      "description": "HTTP status returned by CoinRithm, or 0 for network errors.",
+      "type": "integer"
+    },
+    "ok": {
+      "description": "True when CoinRithm returned a successful 2xx response.",
+      "type": "boolean"
+    }
+  },
+  "required": [
+    "httpStatus",
+    "ok"
+  ],
+  "type": "object"
+}

First observedv0.1.4Jun 10, 2026

TDQS

A4.6/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already indicate read-only, open-world, non-destructive. Description adds significant detail about return fields, decisionEligible meaning, execution cost policy, and fee structure. No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Description is front-loaded with main purpose. While lengthy, each sentence adds value (return fields, dependencies, fees). Could be slightly more concise but effectively structured for a complex tool.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 6 optional parameters and an output schema, the description provides comprehensive context: what it does, what it returns, usage order, fee structure, and paper trading policies. Very complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with each parameter having a description. The tool description does not add extra meaning beyond the schema for the parameters, so baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool finds active-open prediction markets from Kalshi and Polymarket, with specific return fields. It distinguishes from siblings like pm_quote and open_pm_position by noting this is discovery only.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit guidance: use this for discovery, then call pm_quote before open_pm_position. Also mentions paper trading context, though no explicit when-not-to-use, the dependency chain is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.