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Agent skill

Cortx

by BankrBot in BankrBot/skills

Check whether an x402 payment endpoint is reliably delivering value before an agent spends USDC on it.

No licenceAuto-check passedBackend & APIs

Install Cortx

skills CLI
$ npx skills add BankrBot/skills --skill cortx -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install BankrBot/skills cortx --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/BankrBot/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cortx .claude/skills/cortx && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
cortx
GitHub stars
1.2k
Token cost
~2k tokens
SKILL.md length
1,077 words
Files
3
Skills in repo
106
Repo updated
First seen
Licence
None found

At a glance

Check whether an x402 payment endpoint is reliably delivering value before an agent spends USDC on it.

  • Works in 7 steps: Availability — server reachability → Payment terms — 402 response +… → Price check — amount within expected… → …
  • Tasks that involve Smart contracts
  • SKILL.md covers API, Input, Response fields and The 7 failure stages, plus 6 more sections
  • Reaches usecortx.dev

What it does

Cortx is an agent skill from BankrBot/skills. Check whether an x402 payment endpoint is reliably delivering value before an agent spends USDC on it. Runs a 7-stage verification using real on-chain data.

Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `catalog.json`).

It sits in Backend & APIs, covering Smart contracts. It works with x402 and Circle USDC. The repository describes itself as: Bankr Skills equip builders with plug-and-play tools to build more powerful agents.

When your agent uses it

  • Tasks that involve Smart contracts

Example prompts

  • “/cortx”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Availability — server reachability
  2. Payment terms — 402 response + X-Payment-Required header validity
  3. Price check — amount within expected bounds
  4. Payment signing — EIP-712 domain, USDC contract address, chain ID
  5. Delivery — 200 response after payment submitted on-chain
  6. JSON parse — response body is valid JSON
  7. Schema validation — response matches expected structure

What it can do on your machine

Read from SKILL.md and the folder at commit dc47eed. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • usecortx.dev

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cortx loads about 2k tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 1,077 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,077 words (~2,036 tokens).

“Purpose: Check whether an x402 payment endpoint is reliably delivering value before an agent sends USDC to it.”

— opening of SKILL.md by BankrBot
name
cortx

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files in cortx of BankrBot/skills.

  • SKILL.md
  • catalog.json
  • cortx.svg

Open the folder on GitHubat commit dc47eed

Compare with similar skills

Cortx next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cortx compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Cortx this skillBankrBot/skills1.2k—~2kAutomated safety check: PassNone
Alchemy Agentic Gatewaymoonpay/skills113—~2.1kAutomated safety check: NotesMIT
PurposebotLeoYeAI/openclaw-master-skills2.2k—~5kAutomated safety check: PassMIT
BlockrunBlockRunAI/blockrun-mcp391—~2.7kAutomated safety check: PassMIT
Agentic Walletcoinbase/agentic-wallet-skills1262 repos~1kAutomated safety check: PassMIT
SurfBlockRunAI/ClawRouter6.6k—~4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Cortx

What does Cortx do?

Check whether an x402 payment endpoint is reliably delivering value before an agent spends USDC on it. Cortx is an agent skill from BankrBot/skills. Check whether an x402 payment endpoint is reliably delivering value before an agent spends USDC on it.

When should I use Cortx?

Cortx fits situations like: tasks that involve Smart contracts.

How do I install Cortx in Claude Code?

Run `npx skills add BankrBot/skills --skill cortx -a claude-code`. Or copy the skill folder (cortx in BankrBot/skills) into .claude/skills/cortx in your project. Claude Code loads it when a task matches its description.

How do I install Cortx in Codex?

Run `npx skills add BankrBot/skills --skill cortx -a codex`. Or copy the skill folder (cortx in BankrBot/skills) into .agents/skills/cortx in your project. Codex loads it when a task matches its description.

Can I use Cortx in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add BankrBot/skills --skill cortx -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cortx, .gemini/skills/cortx, .github/skills/cortx and .opencode/skills/cortx in your project.

What does Cortx need to run?

SKILL.md names no scripts, command-line tools or credentials: Cortx is instructions for the agent only.

Does Cortx access the network?

SKILL.md names 1 domain. In commands or code: usecortx.dev; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Cortx safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Cortx use?

No licence was found for Cortx or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Cortx use?

About 2k tokens (SKILL.md is roughly 8.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Cortx?

Skills that share tags, products or a category with Cortx: Alchemy Agentic Gateway (moonpay/skills, 113 stars), Purposebot (LeoYeAI/openclaw-master-skills, 2.2k stars), Blockrun (BlockRunAI/blockrun-mcp, 391 stars) and Agentic Wallet (coinbase/agentic-wallet-skills, 126 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cortx?

BankrBot (a GitHub organization) maintains it in BankrBot/skills, which has 1,202 GitHub stars. The repository holds 106 skills in this directory. The repository was last updated on October 10, 2026.

Source: BankrBot/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.