mempool.space Public API

Operate mempool.space Bitcoin fee, mempool, address, transaction, and Lightning explorer reads via UXC + curated OpenAPI schema

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

4. Execute with key/value parameters:

   • mempool-space-openapi-cli get:/address/{address} address=bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh
   • mempool-space-openapi-cli get:/tx/{txid}/status txid=4d5d7f2d5dc69aa68a51887db07dd6d906f31f9141320f9f0b4bab76d735a47f
   • mempool-space-openapi-cli get:/v1/lightning/search searchText=bfx
   • mempool-space-openapi-cli get:/v1/lightning/channels public_key=033d8656219478701227199cbd6f670335c8d408a92ae88b962c49d4dc0e83e025 status=active
   • mempool-space-openapi-cli get:/v1/lightning/channels/{short_id} short_id=835866331763769345

Operations

• get:/v1/fees/recommended
• get:/mempool
• get:/blocks/tip/height
• get:/address/{address}
• get:/tx/{txid}/status
• get:/v1/lightning/statistics/latest
• get:/v1/lightning/search
• get:/v1/lightning/nodes/rankings
• get:/v1/lightning/nodes/{public_key}
• get:/v1/lightning/channels
• get:/v1/lightning/channels/{short_id}

Guardrails

• Keep automation on the JSON output envelope; do not use --text.
• Parse stable fields first: ok, kind, protocol, data, error.
• Treat this v1 skill as read-only. Do not use tx/push, package submission, or internal routes.
• Prefer the curated fee, mempool, and Lightning reads here before dropping to the much larger generic Esplora surface.
• mempool.space is a public explorer service, so mempool state and Lightning rankings can move quickly. Re-query instead of assuming cached values remain current.
• For get:/v1/lightning/channels/{short_id}, mempool.space currently accepts the channel id string even though the route label says short_id; prefer values returned by search or node channel listing.
• mempool-space-openapi-cli <operation> ... is equivalent to uxc https://mempool.space/api --schema-url <mempool_space_openapi_schema> <operation> ....

References

• Usage patterns: references/usage-patterns.md
• Curated OpenAPI schema: references/mempool-space-public.openapi.json
• Official mempool repository: https://github.com/mempool/mempool