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.
npx skills add ofershap/mcp-server-devutils --skill devutilsgit clone --depth 1 https://github.com/ofershap/mcp-server-devutilsWrote 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.
[](https://agentmods.dev/skills/ofershap/mcp-server-devutils/devutils)<a href="https://agentmods.dev/skills/ofershap/mcp-server-devutils/devutils"><img src="https://agentmods.dev/badge/skills/ofershap/mcp-server-devutils/devutils/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.
<a href="https://agentmods.dev/skills/ofershap/mcp-server-devutils/devutils"><img src="https://agentmods.dev/badge/skills/ofershap/mcp-server-devutils/devutils.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00034 | $0.00370 |
| Opus 5.5 | $0.00014 | $0.00148 |
| Sonnet 5.5 | $0.00007 | $0.00074 |
| Haiku 4.5 | $0.00003 | $0.00037 |
Grade A, and why
devutils 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 1mo 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.
What it actually says
Developer Utilities via MCP
Use this skill for everyday developer utility tasks: encoding, hashing, JWT decoding, cron expressions, timestamps, JSON formatting, and regex testing. Zero auth required.
Available Tools
| Category | Tools |
|---|---|
| Encoding | base64_encode, base64_decode |
| ID Generation | uuid_generate, ulid_generate |
| Hashing | hash (single algo), hash_all (all algos) |
| JWT | jwt_decode (header, payload, expiry check) |
| Cron | cron_explain, cron_validate, cron_next |
| Timestamps | timestamp_to_iso, iso_to_timestamp, timestamp_now |
| JSON | json_format, json_minify, json_validate |
| Regex | regex_test |
Key Patterns
jwt_decodeshows header, payload, and checks if expired — does NOT verify signatureshashdefaults to SHA-256;hash_allruns md5, sha1, sha256, sha384, sha512 at oncecron_nextshows the next N scheduled run times — useful for validating cron schedulesuuid_generatecan create multiple UUIDs in one call (passcountparameter)json_validatereports whether input is valid JSON and its root type (object, array, etc.)
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.
- 1mo ago First seen · 30 lines · 34 tokens per session scan A 223c093c3895
devutils is a skill published in the GitHub repository ofershap/mcp-server-devutils (4 stars, last pushed 7mo ago), licensed MIT. It adds 34 tokens to every session and 370 once invoked, about $0.0001 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.
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