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BF payment-402

Access protected APIs and digital resources via the x402 "Payment Required" protocol on Base L2. This skill automates cryptographic handshakes and USDC micro-payments to unlock restricted content. Built for "Pay-per-Resource" agentic billing.

ClawHub Agent Skills author: PayNodeLabs v1.0.1 MIT-0 8 files body ≈ 1 178 tokens Open the sourceclawhub.ai↗ analyzed 4 d ago

As a process F 40/100 · Will not run — References files that are not bundled: @paynodelabs/sdk-js

ProcedureAI and agentsInfrastructuretype and topics are labelled automatically from the skill text
Runs in: OpenClaw Claude / Claude Code ChatGPT / Codex Gemini CLI Cursor GitHub Copilot / VS Code Qwen Code Kimi Code CLI Z.ai (GLM) DeepSeek (Deep Code) Mistral Vibe LangChain (deepagents) Goose OpenCode
JSON
Technical rating
B
83/100
safety, quality, tests
Safety 60%
92
Quality 40%
70
Run on models
none yet
Process rating
F
40/100
Will not run
References files that are not bundled: @paynodelabs/sdk-js
Tools and files w 18
0
Result and completion w 14
0
Inputs and preconditions w 11
0
the three weakest of ten parameters · all ten

What is at stake

Medium-severity findings: the skill is probably honest, but read what alarmed the scanner.

Risky intent medium severity

Below is the worst case for this category. The finding here is medium: the guard saw a sign, not a proof.

If you install

The purpose itself is risky: wallets, browser password stores, offensive security. Even an honest implementation gives the agent access to things that cost money.

For the author

Explain in the description why the access is needed and how it is limited; add tests that show refusals on dangerous requests.

How to improve

  1. Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
  2. The text references files that are not there: add them or drop the references.
For the model run — optional
  • Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
  • A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.

Guard findings · 4

✓ No critical or high findings

Medium and low: 4
  • medium Risky intent intent-wallet-secrets SKILL.md:25
    Handles crypto-wallet secrets (seed / mnemonic / private key) — a classic stealer target
    # [REQUIRED] PayNode Burner Wallet Private Key
  • low Secrets in code secret-high-entropy-token references/TESTING.md:55
    High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
    - **Router Address**: `0x24…a6F`
    fixturequoted
  • low Secrets in code secret-high-entropy-token references/TESTING.md:56
    High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
    - **USDC Address**: `0x10…784`
    fixturequoted
  • low Secrets in code secret-high-entropy-token references/TESTING.md:57
    High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
    - **Merchant Address**: `0x59…C0E` (Treasury for demo)
    fixturequoted

Files scanned: 8. Evidence is masked. Grey chips explain why severity was lowered.

Against the Agent Skills spec

  • warning description-no-when description does not say WHEN to use the skill (no "use when")
  • warning missing-ref reference to a missing file: @paynodelabs/sdk-js
  • note frontmatter-key unknown frontmatter key "required_env_vars"
  • note frontmatter-key unknown frontmatter key "required_binaries"
  • note frontmatter-key unknown frontmatter key "primary_credential"
  • note frontmatter-key unknown frontmatter key "install"

Process rating: all ten parameters 40/100

Will not run. References files that are not bundled: @paynodelabs/sdk-js
  • 0Tools and files. 1 referenced file(s) missing: @paynodelabs/sdk-js
  • 0Result and completion. Does not say what the result is
  • 0Inputs and preconditions. Does not say what the process needs to start
  • 0Progress reporting. Says nothing while it works
  • 20When it triggers. No condition that starts the skill
  • 30Running it twice. 1 mutating operations with no state check
  • 85Steps. 25 steps, 1 vague phrases
  • 100Failures and branches. 3 branches, has a failure section
  • 100Consistency. Name and required fields are in place
  • 100Execution cost. Instruction body is 1178 tokens
  • low The response is described with custom markup (3 tags): a typed call is more reliable

Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.

Quality signals

  • +4Description does not say when NOT to use the skill (false activations)
  • +3Output format is not stated: the model decides each time
  • -34 of 4 scripts are never mentioned in SKILL.md
  • +2Single-language instructions
  • +5Description quotes 2 example trigger phrases
  • +3Description length 242: enough signal without eating the budget
  • +4Structure: 14 headings
  • +3Step-by-step instructions: 25 items
  • +4Has examples (2 code blocks)
  • +4Reference files are cited in the instructions (1 of 1)
  • +1License stated

Quality base 70; lint remarks subtract, signals add up to 100. Result: 70.

External checks

ClawHub: suspicious
This skill appears purpose-built for x402 payments, but it can automatically spend from a local private-key wallet and needs careful review before use.
LLM: suspicious (high) · VirusTotal: · 29 May 2026