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BD x402

Build internet-native payments with x402 - HTTP 402 for on-chain micropayments, no accounts or API keys. Use for paid APIs, paywalled content, agent payment flows, or per-call MCP tools. TypeScript, Python, and Go SDKs across EVM and Solana.

ClawHub Agent Skills author: Misha Kolesnik v0.11.3 MIT-0 19 files body ≈ 4 353 tokens Open the sourceclawhub.ai↗ analyzed 4 d ago

As a process D 42/100 · Unfinished process — weak spots: result and completion, when it triggers, inputs and preconditions

GeneratorGitHubSoftware developmentAI 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
79/100
safety, quality, tests
Safety 60%
73
Quality 40%
87
Run on models
none yet
Process rating
D
42/100
Unfinished process
Result and completion w 14
0
Inputs and preconditions w 11
0
Progress reporting w 2
0
the three weakest of ten parameters · all ten

How to improve

    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 · 27

    ✓ No critical or high findings

    Medium and low: 27
    • low Secrets in code secret-high-entropy-token CHANGELOG.md:142
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      - Corrected the `x402…oxy` contract address to `0x40…002`. The previous value was a stale pre-redeployment address - a fund-loss hazard if copied into sig
      quoted
    • low Secrets in code secret-high-entropy-token references/core-concepts.md:192
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      asset: "0x03…F7e",  // Token address
      quoted
    • low Secrets in code secret-high-entropy-token references/core-concepts.md:205
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      asset="0x03…F7e",
      quoted
    • low Secrets in code secret-high-entropy-token references/evm-scheme.md:28
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `x402…oxy` | `0x40…001` | Exact-amount Permit2 settlement |
      table
    • low Secrets in code secret-high-entropy-token references/evm-scheme.md:29
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `x402…oxy` | `0x40…002` | Variable-amount Permit2 settlement |
      table
    • low Secrets in code secret-high-entropy-token references/evm-scheme.md:30
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | Permit2 (canonical) | `0x00…BA3` | Uniswap Permit2 |
      table
    • low Secrets in code secret-high-entropy-token references/evm-scheme.md:31
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | Multicall3 | `0xcA…A11` | Batched reads |
      table
    • low Secrets in code secret-high-entropy-token references/evm-scheme.md:193
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | Base Sepolia (`eip1…532`) | USDC | `0x03…F7e` | 6 | EIP-3009 | - |
      table
    • low Secrets in code secret-high-entropy-token references/extensions.md:301
      High-entropy token-like string (may be an id, hash or a credential)
      import { decl…ion } from "@x402/extensions";
    • low Secrets in code secret-high-entropy-token references/extensions.md:312
      High-entropy token-like string (may be an id, hash or a credential)
      import { decl…ion } from "@x402/extensions";
    • low Secrets in code secret-high-entropy-token references/protocol-spec.md:42
      High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
      "asset": "0x03…F7e",
      fixturequoted
    • low Secrets in code secret-high-entropy-token references/protocol-spec.md:43
      High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
      "payTo": "0x20…87C",
      fixturequoted
    • low Secrets in code secret-high-entropy-token references/protocol-spec.md:104
      High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
      "asset": "0x03…F7e",
      fixturequoted
    • low Secrets in code secret-high-entropy-token references/protocol-spec.md:105
      High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
      "payTo": "0x20…87C",
      fixturequoted
    • low Secrets in code secret-high-entropy-token references/protocol-spec.md:112
      High-entropy token-like string (may be an id, hash or a credential) (test fixture / example file; quoted — discussed, not commanded)
      "from": "0x85…b66",
      fixturequoted
    • low Secrets in code secret-high-entropy-token references/svm-scheme.md:11
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `<USDC_SOL_MINT>` | `EPjF…t1v` (USDC mint, Solana Mainnet) |
      table
    • low Secrets in code secret-high-entropy-token references/svm-scheme.md:12
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `<USDC_SOL_DEVNET_MINT>` | `4zMM…cDU` (USDC mint, Solana Devnet/Testnet) |
      table
    • low Secrets in code secret-high-entropy-token references/svm-scheme.md:13
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `<SPL_TOKEN_PROGRAM>` | `Toke…5DA` (SPL Token program) |
      table
    • low Secrets in code secret-high-entropy-token references/svm-scheme.md:14
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `<SPL_…RAM>` | `Toke…uEb` (Token-2022 program) |
      table
    • low Secrets in code secret-high-entropy-token references/svm-scheme.md:15
      High-entropy token-like string (may be an id, hash or a credential) (documentation table row)
      | `<LIGHTHOUSE_PROGRAM>` | `L2TE…S95` (Lighthouse instruction-guard program, injected by Phantom/Solflare) |
      table
    • low Secrets in code secret-high-entropy-token references/typescript-sdk.md:775
      High-entropy token-like string (may be an id, hash or a credential)
      import { decl…ion } from "@x402/extensions";
    • low Secrets in code secret-high-entropy-token references/typescript-sdk.md:782
      High-entropy token-like string (may be an id, hash or a credential)
      import { decl…ion } from "@x402/extensions";
    • low Secrets in code secret-high-entropy-token references/upto-scheme.md:61
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      "asset": "0x03…F7e",
      quoted
    • low Secrets in code secret-high-entropy-token references/upto-scheme.md:62
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      "payTo": "0x20…87C",
      quoted
    • low Secrets in code secret-high-entropy-token references/upto-scheme.md:69
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      "token": "0x03…F7e",
      quoted
    • low Secrets in code secret-high-entropy-token references/upto-scheme.md:72
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      "from": "0x85…b66",
      quoted
    • low Secrets in code secret-high-entropy-token references/upto-scheme.md:73
      High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
      "spender": "0x40…002",
      quoted

    Files scanned: 19. Evidence is masked. Grey chips explain why severity was lowered.

    Against the Agent Skills spec

    ✓ No remarks against the Agent Skills spec

    Process rating: all ten parameters 42/100

    • 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. 6 mutating operations with no state check
    • 40Consistency. Frontmatter name (x402) differs from the folder (x402-development)
    • 50Failures and branches. 0 branches, has a failure section
    • 60Tools and files. Uses tools (web, python, node) that frontmatter does not declare
    • 70Execution cost. Instruction body is 4353 tokens
    • 100Steps. 31 steps
    • low 12 top-level sections: this looks like several domains in one skill

    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

    • +5Description has no quoted example phrases that should trigger the skill
    • +4Description does not say when NOT to use the skill (false activations)
    • +3Output format is not stated: the model decides each time
    • -2localhost URLs: will not work for another user
    • +2Single-language instructions
    • +3Description length 241: enough signal without eating the budget
    • +4Structure: 17 headings
    • +3Step-by-step instructions: 31 items
    • +4Has examples (9 code blocks)
    • +4Reference files are cited in the instructions (15 of 15)
    • +1License stated

    Quality base 70; lint remarks subtract, signals add up to 100. Result: 87.

    External checks

    ClawHub: suspicious
    This payment-development skill is coherent, but its examples handle wallet keys and bearer tokens in ways that need careful review before use.
    LLM: suspicious (high) · 9 Sept 2026