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 BlockRunAI/blockrun-mcp --skill blockrungit clone --depth 1 https://github.com/BlockRunAI/blockrun-mcpWrote 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/blockrunai/blockrun-mcp/blockrun)<a href="https://agentmods.dev/skills/blockrunai/blockrun-mcp/blockrun"><img src="https://agentmods.dev/badge/skills/blockrunai/blockrun-mcp/blockrun/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/blockrunai/blockrun-mcp/blockrun"><img src="https://agentmods.dev/badge/skills/blockrunai/blockrun-mcp/blockrun.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Prompt Injection · line 71 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
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 | $0.00242 | $0.02750 |
| Opus 5.5 | $0.00097 | $0.01100 |
| Sonnet 5.5 | $0.00048 | $0.00550 |
| Haiku 4.5 | $0.00024 | $0.00275 |
Grade A, and why
blockrun scanned grade A with 1 finding 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 8d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| A fixed yes/no, choice or score over many items, free | *(no tool)* — `curl api.blockrun.ai/v1/decisions` | Needs a free key; see the `decide` skill. You are the better one-off judge | How it starts
The opening of the file, as written. The whole thing — 186 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BlockRun
One wallet, pay-per-call, no API keys. Every paid tool below settles in USDC over x402 at the moment of the call.
Never quote a price from memory
There is no price table in this skill, and that is deliberate. Every flat per-call price published in this repo drifted by exactly the per-transaction fee the last time that fee changed, because each one was a typed copy. Read prices from a live source instead:
| Need | Where |
|---|---|
| Per-token model pricing | blockrun_models |
| What a call will actually cost | the 402 response — it carries the real amount |
| Full endpoint catalog with prices | https://blockrun.ai/llms.txt (Base) · https://sol.blockrun.ai/llms.txt (Solana) |
The tool descriptions in the MCP server carry the published base prices too; they are typed by hand and verified against live 402 quotes by npm run verify:prices, and the 402 header is what actually gets charged.
The two chains are not the same gateway
blockrun.ai and sol.blockrun.ai are separate deployments, and
blockrun_wallet action: "chain" switches between them mid-session. Two consequences,
both easy to miss because nothing announces the switch:
Prices differ, on purpose. Every figure in these skills is the Base price. Base
adds a flat per-transaction fee; Solana deliberately adds none — the ~$0.001-per-call gap
is pricing policy (an incentive to settle on Solana), not drift, so do not expect it to be
"fixed". Each gateway's own llms.txt quotes its own convention — read the one for the
chain you are on, or just read the 402.
Some tools do not exist on Solana at all. Verified against both gateways 2026-08-07:
| Tool | On Solana | What you get |
|---|---|---|
blockrun_defi |
✗ not served | 404 — reads like a bad path, but the path is fine |
blockrun_modal |
✗ not served | 503 on all four sandbox actions — reads like an outage |
| everything else | ✓ | ~$0.001 cheaper than the figure printed here |
Both tools now refuse before the round trip and tell you to switch, so you should never
see the raw 404/503 through the MCP. If you are calling the HTTP API directly you
will, and neither status says "wrong chain" — check the chain first.
What ships with it
1 file 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.
- 8d ago Changed 5a1ee0ce8876
- 12d ago Changed 4e5b8258c656
- 29d ago Changed · +1 lines 84efa477f6ad
- 1mo ago Changed · +1 tokens per session 98b110230b17
- 1mo ago Changed · +1 lines · -5 tokens per session 4afac6b80e28
- 1mo ago Changed d92ea6947811
- 1mo ago First seen · 184 lines · 246 tokens per session scan A f999d97fc8c5
blockrun is a skill published in the GitHub repository BlockRunAI/blockrun-mcp (391 stars, last pushed 7d ago), licensed MIT. It adds 242 tokens to every session and 2,750 once invoked, about $0.0010 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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