A skill for retrieving live blockchain data from The Graph, a service that indexes data from decentralized applications. It discovers suitable subgraphs, checks the price, and pays for queries in USDC from a wallet on Base.

Finding subgraphs and querying data about DeFi, exchange pools, NFTs, ENS, tokens, and governance across supported blockchain networks.

It avoids relying on stale or hard-to-find blockchain data and makes the cost visible before a query spends real money.

payql — Skill for Claude Code and Codex by PaulieB14

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 PaulieB14/payql --skill skill

Clone the repo

git clone --depth 1 https://github.com/PaulieB14/payql

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/paulieb14/payql/skill/github.svg)](https://agentmods.dev/skills/paulieb14/payql/skill)

Your own site

<a href="https://agentmods.dev/skills/paulieb14/payql/skill"><img src="https://agentmods.dev/badge/skills/paulieb14/payql/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/paulieb14/payql/skill"><img src="https://agentmods.dev/badge/skills/paulieb14/payql/skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 134 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,083 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.

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	$0.00134	$0.01083
Opus 5.5	$0.00054	$0.00433
Sonnet 5.5	$0.00027	$0.00217
Haiku 4.5	$0.00013	$0.00108

Measured 2mo ago against content hash 361934f49123, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

payql 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 2mo 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.

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.

skill/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PayQL — pay-per-query data from The Graph

Get live on-chain data from The Graph's subgraphs (DeFi, DEX pools, NFTs, ENS, tokens, governance — 15,000+ subgraphs across 20+ chains), paying ~$0.01 USDC per query over x402. No API key, no account, no ETH for gas — the payment is the auth, and it's gasless (EIP-3009 transferWithAuthorization on Base).

💸 This spends real USDC. Every paid query is a live on-chain micropayment (~$0.01) from your wallet — it is not a free, read-only API, and the payment is visible on-chain and to the x402 facilitator. Quote the price first (free), and fund a dedicated, low-balance wallet — see Wallet & safety.

The loop: discover → price → query

Discover the right live subgraph for a protocol — ranked by on-chain curation signal, so you skip dead forks.
Price it — preflight the 402 challenge to read the exact USDC cost before paying (free).
Query — send GraphQL, pay the 402 from your wallet, get the data + a receipt back.

Two ways to run it

A. PayQL MCP server (turnkey)

Install and wire into your harness (Claude Desktop / Code / Cursor):

{
  "mcpServers": {
    "payql": {
      "command": "npx",
      "args": ["-y", "payql"],
      "env": { "PAYQL_NETWORK": "base", "PAYQL_PRIVATE_KEY": "0xYOUR_BASE_WALLET_KEY" }
    }
  }
}

⚠️ PAYQL_PRIVATE_KEY can spend its wallet's USDC. Use a dedicated, low-balance Base wallet — never a primary, valuable, or reused key. It sits in your harness config (which can be logged, synced, or screenshotted), so treat it like any secret: don't commit it or paste it in shared chats. Don't want a raw key here? Use option B (your harness's own wallet) or an Ampersend-managed wallet with spend caps.

Tools: search_subgraphs, get_payment_info (free price quote), query_subgraph (paid), get_subgraph_schema, wallet_status. Full recipe + example queries in references/gateway.md.

Read the full file on GitHub · 60 lines

Files

What ships with it

2 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.

2mo ago First seen · 60 lines · 134 tokens per session scan A 361934f49123

Subscribe to this mod's changes

payql is a skill published in the GitHub repository PaulieB14/payql (0 stars, last pushed 3mo ago), licensed MIT. It adds 134 tokens to every session and 1,083 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-08-31.

Finance and fintech Web3 and blockchain

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