mempool-space-openapi-skill

mempool-space-openapi-skill is a skill for Claude Code, Codex from holon-run/uxc. It costs 39 tokens per session (1,181 once invoked), scanned A, original, MIT.

A read-only interface to mempool.space, a public website that tracks Bitcoin transactions, blocks, fees, and the Lightning Network. It uses a defined API description to run supported lookups without authentication.

In plain words
What is it for?
Checking Bitcoin fees and mempool activity, looking up block height, addresses, and transactions, and reading Lightning network statistics, node rankings, node details, and channels.
Why use it?
It gives an agent a consistent way to inspect Bitcoin and Lightning data without manually browsing the explorer or building API requests.

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/holon-run/uxc/mempool-space-openapi-skill
Any agent
npx skills add holon-run/uxc --skill mempool-space-openapi-skill
Clone the repo
git clone --depth 1 https://github.com/holon-run/uxc

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 mempool-space-openapi-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/holon-run/uxc/mempool-space-openapi-skill.svg)](https://agentmods.dev/skills/holon-run/uxc/mempool-space-openapi-skill)
Your own site
<a href="https://agentmods.dev/skills/holon-run/uxc/mempool-space-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/mempool-space-openapi-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,181 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00039 $0.01181
Opus 5 $0.00019 $0.00590
Sonnet 5 $0.00008 $0.00236
Haiku 4.5 $0.00004 $0.00118

Measured 5d ago against content hash cb0c66175c58, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mempool-space-openapi-skill scanned grade A with 0 findings 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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/mempool-space-openapi-skill/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mempool.space API Skill

Use this skill to run mempool.space public Bitcoin and Lightning explorer operations through uxc + OpenAPI.

Reuse the uxc skill for shared execution, auth, and error-handling guidance.

Prerequisites

  • uxc is installed and available in PATH.
  • Network access to https://mempool.space/api.
  • Access to the curated OpenAPI schema URL:
    • https://raw.githubusercontent.com/holon-run/uxc/main/skills/mempool-space-openapi-skill/references/mempool-space-public.openapi.json

Scope

This skill covers a read-first mempool.space surface for:

  • Bitcoin fee estimation and mempool state reads
  • block tip height checks
  • address and transaction status reads
  • Lightning network search, statistics, node rankings, node detail, and channel reads

This skill does not cover:

  • transaction broadcast or package submission
  • websocket subscriptions
  • internal or admin routes
  • every Esplora-compatible endpoint exposed by mempool.space

Authentication

mempool.space public reads in this skill do not require authentication.

Core Workflow

  1. Use the fixed link command by default:

    • command -v mempool-space-openapi-cli
    • If missing, create it: uxc link mempool-space-openapi-cli https://mempool.space/api --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/mempool-space-openapi-skill/references/mempool-space-public.openapi.json
    • mempool-space-openapi-cli -h
  2. Inspect operation schema first:

    • mempool-space-openapi-cli get:/v1/fees/recommended -h
    • mempool-space-openapi-cli get:/mempool -h
    • mempool-space-openapi-cli get:/address/{address} -h
    • mempool-space-openapi-cli get:/v1/lightning/search -h
    • mempool-space-openapi-cli get:/v1/lightning/channels/{short_id} -h
  3. Prefer narrow reads before broader scans:

    • mempool-space-openapi-cli get:/v1/fees/recommended
    • mempool-space-openapi-cli get:/blocks/tip/height
    • mempool-space-openapi-cli get:/v1/lightning/statistics/latest

Read the full file on GitHub · 95 lines

Files

What ships with it

4 files 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. 5d ago First seen · 95 lines · 39 tokens per session scan A cb0c66175c58

Subscribe to this mod's changes

mempool-space-openapi-skill is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed 27d ago), licensed MIT. It adds 39 tokens to every session and 1,181 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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