What is dune-mcp-skill?

A connection to Dune, a blockchain data platform where tables and SQL queries are used to analyse on-chain activity. It can discover tables, create and run queries, retrieve results, and make visualisations.

Use it to search blockchain tables, investigate contract or wallet activity with SQL, retrieve query results, and present findings visually.

It helps an agent find the right blockchain data and work with query results through a defined interface. Authentication and credit-consuming actions are handled explicitly before execution.

dune-mcp-skill — Skill for Codex by holon-run

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.

Any agent

npx skills add holon-run/uxc --skill dune-mcp-skill

Clone the repo

git clone --depth 1 https://github.com/holon-run/uxc

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/holon-run/uxc/dune-mcp-skill/github.svg)](https://agentmods.dev/skills/holon-run/uxc/dune-mcp-skill)

Your own site

<a href="https://agentmods.dev/skills/holon-run/uxc/dune-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/dune-mcp-skill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/holon-run/uxc/dune-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/dune-mcp-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,198 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 4 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Data Exfiltration · line 15
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
medium Data Exfiltration · line 21
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
medium Data Exfiltration · line 28
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
medium Data Exfiltration · line 72
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00047	$0.01198
Opus 5	$0.00023	$0.00599
Sonnet 5	$0.00009	$0.00240
Haiku 4.5	$0.00005	$0.00120

Measured 9d ago against content hash fde85e755444, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

dune-mcp-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 9d 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/dune-mcp-skill/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Dune MCP Skill

Use this skill to run Dune MCP operations through uxc.

Reuse the uxc skill for shared protocol discovery, output parsing, and generic auth/binding flows.

Prerequisites

uxc is installed and available in PATH.
Network access to https://api.dune.com/mcp/v1.
Dune API key is available for authenticated calls.

Core Workflow

Confirm endpoint and protocol with help-first probing:
- uxc https://api.dune.com/mcp/v1 -h
Configure credential/binding for repeatable auth:
- uxc auth credential set dune-mcp --auth-type api_key --header "x-dune-api-key={{secret}}" --secret-env DUNE_API_KEY
- uxc auth credential set dune-mcp --auth-type api_key --header "x-dune-api-key={{secret}}" --secret-op op://Engineering/dune/api-key
- uxc auth binding add --id dune-mcp --host api.dune.com --path-prefix /mcp/v1 --scheme https --credential dune-mcp --priority 100
Use fixed link command by default:
- command -v dune-mcp-cli
- If missing, create it: uxc link dune-mcp-cli https://api.dune.com/mcp/v1
- dune-mcp-cli -h
Inspect operation schema before execution:
- dune-mcp-cli searchTables -h
- dune-mcp-cli searchTablesByContractAddress -h
- dune-mcp-cli createDuneQuery -h
- dune-mcp-cli executeQueryById -h
- dune-mcp-cli getExecutionResults -h
Prefer read/discovery operations first, then query creation or credit-consuming execution.

Capability Map

Discovery:
- searchDocs
- searchTables
- listBlockchains
- searchTablesByContractAddress
Query lifecycle:
- createDuneQuery
- getDuneQuery
- updateDuneQuery
- executeQueryById
- getExecutionResults
Analysis helpers:
- generateVisualization
- getTableSize
- getUsage

Recommended Usage Pattern

Find the right table first:
- dune-mcp-cli searchTables query='uniswap swaps'
- dune-mcp-cli searchTablesByContractAddress contractAddress=0x...
Prefer higher-level spell tables when they already expose the metrics you need.
Keep SQL partition-aware:
- use block_date, evt_block_date, or another partition/date column in WHERE
Create a temporary query only after confirming table choice and date range.
Execute and fetch results by execution ID.

Read the full file on GitHub · 126 lines

Files

What ships with it

3 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.

9d ago First seen · 126 lines · 47 tokens per session scan A fde85e755444

Subscribe to this mod's changes

dune-mcp-skill is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed today), licensed MIT. It adds 47 tokens to every session and 1,198 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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