@sperax/tool-limitless

Read and trade Limitless prediction markets (Base AMM).

Limitless is an agent tool from SperaxOS, packaged headless so you can call it from any agent framework. It ships two things: the manifest — a JSON-Schema function definition a model can call — and the executor that runs the call against the real API.

There is no UI layer and no framework lock-in. It works anywhere TypeScript runs.

Install

npm install @sperax/tool-limitless

Usage

Call it directly

import { limitlessExecutor } from '@sperax/tool-limitless';

const result = await limitlessExecutor.invoke('listMarkets', {"status":"active","category":"<category>"}, {
  messageId: 'msg-1',
});

console.log(result.content); // prose summary written for the model to read
console.log(result.state);   // typed data payload for your own UI

Give it to a model

import Anthropic from '@anthropic-ai/sdk';
import { LimitlessManifest, limitlessExecutor } from '@sperax/tool-limitless';

const client = new Anthropic();

const response = await client.messages.create({
  model: 'claude-opus-4-8',
  max_tokens: 1024,
  messages: [{ role: 'user', content: 'Ask something this tool can answer' }],
  tools: LimitlessManifest.api.map((api) => ({
    name: api.name,
    description: api.description,
    input_schema: api.parameters,
  })),
});

for (const block of response.content) {
  if (block.type !== 'tool_use') continue;
  const result = await limitlessExecutor.invoke(block.name, block.input, { messageId: response.id });
  console.log(result.content);
}

LimitlessManifest.api is already in JSON-Schema form, so it maps onto any tool-calling API — Anthropic, OpenAI, the Vercel AI SDK, or an MCP server — without translation.

Every executor returns a BuiltinToolResult — { success, content, state }. content is prose written for the model to read; state is the typed data payload for your own code. Executors never throw: a failed call comes back as { success: false, content: '<reason>' }, so a network blip degrades the answer instead of crashing the agent loop.

Configuration — required

This tool needs a backend you control. It will not work on a bare npm install alone.

The upstream API requires a secret key. That key is deliberately not bundled here — shipping it in an npm package would leak it to every consumer. Instead the executor calls a SperaxOS /webapi/* route, which holds the key server-side and injects it. That route is session-authenticated, so the public deployment at https://chat.sperax.io (the default origin) answers 401 to anonymous callers.

To use this tool you need one of:

• a SperaxOS deployment of your own, or
• any HTTP endpoint that implements the same request shape and supplies the key.

Point the package at it before importing the tool — the URL is resolved once, when the module first loads:

SPERAX_API_BASE_URL=https://my-speraxos.example.com

or in code:

import { configureSperaxApi } from '@sperax/agent-tools-core';

configureSperaxApi({ baseUrl: 'https://my-speraxos.example.com' });

// import the tool only after configuring, so the path resolves against your origin
const { limitlessExecutor } = await import('@sperax/tool-limitless');

Inside a browser that already serves those routes at its own origin, requests stay same-origin and no configuration is needed.

If you want a tool that runs with zero setup, use one of the standalone tools — those call public APIs directly and need no key, no origin, and no backend.

Tool identifier

sperax-limitless

API reference

listMarkets

List Limitless markets. Optionally filter by status (active|closed|resolved|paused) or category.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | status | active | closed | resolved | paused | no | Lifecycle filter. Default: active. | | category | string | no | Limitless category slug, e.g. "politics", "crypto". | | limit | number | no | Page size, max 100. Default 100. | | offset | number | no | Pagination offset. Default 0. |

getMarket

Fetch a single Limitless market including current AMM curve parameters (qYes, qNo, b).

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | marketId | string | yes | Limitless market id. |

getPriceCurve

Return the YES/NO price curve sampled across hypothetical buy sizes for chart preview.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | marketId | string | yes | | | samples | number | no | Curve resolution. Default 50. | | maxUsd | number | no | Max USD to step out. Default 1000. |

quoteTrade

Quote a buy. Set preview:true for an instant local LMSR estimate; otherwise the server quote endpoint is hit (authoritative).

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | marketId | string | yes | | | side | yes | no | yes | | | amountUsd | number | yes | USD amount to spend. | | preview | boolean | no | If true, compute locally without an API roundtrip. | | slippage | number | no | Slippage tolerance fraction. Default 0.01. |

placeTrade

Submit a pre-signed EIP-712 Trade. The signedTrade object must come from the user wallet — do not synthesize it.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | marketId | string | yes | | | signedTrade | object | yes | Result of signTrade(): { payload, signature, signer, side, amount, expectedShares, slippage }. |

getUserPositions

List open positions for a user. Omit address to use the authenticated session.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | address | string | no | EVM address. Optional. |

claimResolved

Claim winnings on a resolved market.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | marketId | string | yes | |

getLeaderboard

Top traders by PnL, volume, or winrate over the chosen range.

| Parameter | Type | Required | Description | | --- | --- | --- | --- | | range | 24h | 7d | 30d | all | no | Default 30d. | | sort | pnl | volume | winrate | no | Default pnl. | | limit | number | no | Default 50. |

Types

Shared types come from @sperax/agent-tools-core: BuiltinToolManifest, BuiltinToolResult, BuiltinToolContext, and the BaseExecutor class every tool executor extends.

Related

• @sperax/agent-tools-core — the tool contract
• All SperaxOS agent tools — tool-limitless is one of many
• SperaxOS — the agent workspace these tools were built for

License

Apache-2.0