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AB smtping-email-verification

Verify email addresses with the SMTPing API before sending, importing or storing them. Use when the user asks to verify, validate, check or clean one email address or a list (CSV, pasted text, CRM export), wants to know which contacts are safe to email, asks about bounces, disposable, spamtrap, spambot or complainer addresses, or asks for their SMTPing credit balance.

ClawHub Agent Skills author: smtping email verifier v1.0.2 MIT-0 2 files body ≈ 1 203 tokens Open the sourceclawhub.ai↗ analyzed 6 d ago

Verify email addresses with the SMTPing API before sending, importing or storing them.

As a process B 73/100 · Nearly there — weak spots: inputs and preconditions, running it twice

IntegrationData and analyticsSales and CRMtype 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
A
95/100
safety, quality, tests
Safety 60%
99
Quality 40%
88
Run on models
none yet
Process rating
B
73/100
Nearly there
Inputs and preconditions w 11
30
Running it twice w 4
30
Tools and files w 18
60
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 · 1

    ✓ No critical or high findings

    Medium and low: 1
    • low Exfiltration net-credential-use SKILL.md:88
      Credential used in a network call (verify the destination is the intended service) (the skill's own vendor host)
      curl -s https://api.smtping.com/api/v1/credits -H "X-API-Key: $SMTPING_API_KEY"
      vendor-host

    Files scanned: 2. 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 73/100

    • 30Inputs and preconditions. Does not say what the process needs to start
    • 30Running it twice. 14 mutating operations with no state check
    • 60Tools and files. Uses tools (bash, web) that frontmatter does not declare
    • 60Result and completion. Output format stated, no completion criterion
    • 70When it triggers. States when to use, but not when not to
    • 100Steps. 19 steps
    • 100Failures and branches. 1 branches, has a failure section
    • 100Consistency. Name and required fields are in place
    • 100Execution cost. Instruction body is 1203 tokens
    • 100Progress reporting. Reports progress

    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)
    • +2Single-language instructions
    • +3Description length 370: enough signal without eating the budget
    • +4Structure: 13 headings
    • +3Step-by-step instructions: 19 items
    • +3Output format is stated explicitly
    • +4Has examples (6 code blocks)
    • +1License stated

    Quality base 70; lint remarks subtract, signals add up to 100. Result: 88.

    External checks

    ClawHub: clean
    This skill is a disclosed SMTPing email verification helper that sends user-provided email addresses to SMTPing for the stated purpose.
    LLM: benign (high) · VirusTotal: · 27 Sept 2026