metaculus

metaculus is a skill for Claude Code, Codex from Outsharp/shipp-skills. It costs 50 tokens per session (11,128 once invoked), scanned A, original, Apache-2.0.

A skill for working with Metaculus, a website where people forecast real-world events and receive scores for prediction accuracy. It uses the Metaculus API, the service that lets software read and manage the platform’s data.

In plain words
What is it for?
Use it to browse questions, read community forecasts, submit predictions, manage comments, and download forecast data.
Why use it?
It provides a defined way for an agent to access forecasting questions and community predictions instead of handling those requests manually. The description does not specify how forecasts are evaluated beyond the platform’s own scoring.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/outsharp/shipp-skills/metaculus
Any agent
npx skills add Outsharp/shipp-skills --skill metaculus
Clone the repo
git clone --depth 1 https://github.com/Outsharp/shipp-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for metaculus

README.md
[![agentmods](https://agentmods.dev/badge/skills/outsharp/shipp-skills/metaculus.svg)](https://agentmods.dev/skills/outsharp/shipp-skills/metaculus)
Your own site
<a href="https://agentmods.dev/skills/outsharp/shipp-skills/metaculus"><img src="https://agentmods.dev/badge/skills/outsharp/shipp-skills/metaculus.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,128 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00050 $0.11128
Opus 5 $0.00025 $0.05564
Sonnet 5 $0.00010 $0.02226
Haiku 4.5 $0.00005 $0.01113

Measured 4d ago against content hash c5ad85187153, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

metaculus scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Any HTTP client (curl, Python requests, fetch, etc.)
skills/metaculus/SKILL.md · 1,196 lines

How it starts

The opening of the file, as written. The whole thing — 1,196 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Metaculus API

Metaculus is a forecasting platform where users predict outcomes of real-world events. Questions range across science, technology, politics, economics, and more. The platform aggregates individual forecasts into community predictions and scores forecasters on accuracy.

Check this skill and the official API documentation FREQUENTLY for updates.

Feedback: Contact the Metaculus team at [email protected] with questions, ideas, or feedback.

Source code & issues: github.com/Metaculus/metaculus


Key Concepts (Glossary)

Term Definition
Post The primary feed entity. A post wraps a question, group of questions, conditional pair, or notebook. Posts have statuses, authors, projects, and comments.
Question A single forecastable item within a post. Types: binary, multiple_choice, numeric, discrete, date.
Group of Questions A post containing multiple related sub-questions displayed together (e.g., "What will GDP be in 2025, 2026, 2027?").
Conditional A post with paired questions: "If [condition], what is P(child)?" — produces question_yes and question_no variants.
Forecast A user's prediction on a question. Format depends on question type: probability (binary), CDF (continuous), or distribution (multiple choice).
Community Prediction (CP) The aggregated forecast from all users, computed via various aggregation methods.
Aggregation Method How individual forecasts are combined: recency_weighted (default), unweighted, metaculus_prediction, single_aggregation.
Project A container for posts — can be a tournament, category, tag, question series, or site section.
Tournament A special project type with prize pools, start/close dates, and leaderboards.
Category A topic classification (e.g., "Nuclear Technology & Risks", "Health & Pandemics").
Resolution The actual outcome of a question once known. Values vary by type: yes/no (binary), a number, a date, or an option name.
Curation Status Editorial status of a post: draft, pending, rejected, approved.
Scaling Defines how a continuous question's range maps to the CDF. Includes range_min, range_max, zero_point (for log scale), and bounds.
CDF Cumulative Distribution Function — the format for continuous forecasts. A list of 201 floats (or inbound_outcome_count + 1 for discrete).
Inbound Outcome Count Number of possible outcomes within a question's range (excluding out-of-bounds). Default is 200 for continuous; smaller for discrete.

Read the full file on GitHub · 1,196 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 1,196 lines · 50 tokens per session scan A c5ad85187153

Subscribe to this mod's changes

metaculus is a skill published in the GitHub repository Outsharp/shipp-skills (4 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 50 tokens to every session and 11,128 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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