Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Sudhan30/freshprobe/plugin install freshprobeWrote 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/sudhan30/freshprobe/freshprobe-check)<a href="https://agentmods.dev/skills/sudhan30/freshprobe/freshprobe-check"><img src="https://agentmods.dev/badge/skills/sudhan30/freshprobe/freshprobe-check/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/sudhan30/freshprobe/freshprobe-check"><img src="https://agentmods.dev/badge/skills/sudhan30/freshprobe/freshprobe-check.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 | $0.00100 | $0.00824 |
| Opus 5 | $0.00050 | $0.00412 |
| Sonnet 5 | $0.00020 | $0.00165 |
| Haiku 4.5 | $0.00010 | $0.00082 |
Grade A, and why
freshprobe-check 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Freshprobe: Data Freshness Verification
Requires freshprobe binary in PATH. Install: go install github.com/Sudhan30/freshprobe/cmd/freshprobe@latest
Commands
Single check:
freshprobe check <url> --stateless --output text
Content change detection:
freshprobe check <url> --repeat 3 --interval 2s --stateless
Policy evaluation:
freshprobe check <url> --policy-dir ${CLAUDE_PLUGIN_ROOT}/policies --policy <name> --stateless --output text
Batch check:
freshprobe batch <url1> <url2> ... --stateless --concurrency 5
Flags
--output text|json, --repeat N, --interval 2s, --timeout 10s, --skip-tls, --skip-dns, --policy <name>, --policy-dir <path>, --stateless
Verdicts
- FRESH: Data is current, endpoint healthy. Safe to proceed.
- STALE: Old data or degraded endpoint. Consider retry or fallback.
- UNKNOWN: Insufficient signals. Use
--repeat 3for fingerprinting. - Confidence: 0.0 (no data) to 1.0 (high certainty).
Built-in Policies
| Policy | Max Staleness | Min Freshness | Max P95 |
|---|---|---|---|
api-realtime |
60s | 0.8 | 500ms |
api-standard |
5m | 0.6 | 2000ms |
static-content |
24h | 0.3 | 2000ms |
financial-data |
30s | 0.9 | 200ms |
Common Workflows
"Is this API fresh?"
Run freshprobe check <url> --stateless --output text. Check the verdict line.
"Check all endpoints before a batch job"
Run freshprobe batch <urls> --stateless. Filter for non-FRESH verdicts.
"Does this meet our SLA?"
Run with --policy-dir and --policy. Check Policy: PASS/FAIL line.
"Is content actually updating?"
Run with --repeat 3 --interval 2s. Check content_changed_since_last_probe.
"Check TLS certificate"
Run basic check. The tls section shows valid, days_remaining, ocsp_status.
Troubleshooting
- "command not found": Run
go install github.com/Sudhan30/freshprobe/cmd/freshprobe@latestand ensure$HOME/go/binis in PATH. - "policy not found": Error lists available policies. Check
--policy-dirpath. - Freshness score 0.5: Endpoint has no cache headers. Add
--repeat 3for fingerprinting.
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 84 lines · 100 tokens per session scan A f36f547645c2
freshprobe-check is a skill published in the GitHub repository Sudhan30/freshprobe (2 stars, last pushed 5mo ago), licensed MIT. It adds 100 tokens to every session and 824 once invoked, about $0.0005 per session on Opus 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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