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 holon-run/uxc --skill blockscout-openapi-skillgit clone --depth 1 https://github.com/holon-run/uxcWrote 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/holon-run/uxc/blockscout-openapi-skill)<a href="https://agentmods.dev/skills/holon-run/uxc/blockscout-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/blockscout-openapi-skill/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/holon-run/uxc/blockscout-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/blockscout-openapi-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00035 | $0.01137 |
| Opus 5.5 | $0.00014 | $0.00455 |
| Sonnet 5.5 | $0.00007 | $0.00227 |
| Haiku 4.5 | $0.00003 | $0.00114 |
Grade A, and why
blockscout-openapi-skill 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.
How it starts
The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Blockscout Explorer API Skill
Use this skill to run Blockscout explorer operations through uxc + OpenAPI.
Reuse the uxc skill for shared execution, auth, and error-handling guidance.
Prerequisites
uxcis installed and available inPATH.- Network access to a Blockscout deployment that exposes
/api/v2. - Access to the curated OpenAPI schema URL:
https://raw.githubusercontent.com/holon-run/uxc/main/skills/blockscout-openapi-skill/references/blockscout-v2.openapi.json
- A target Blockscout instance. Examples in this skill use
https://eth.blockscout.com/api/v2.
Scope
This skill covers a read-first explorer surface:
- address summary lookup
- address token balances
- address transaction history
- token metadata
- token holder reads
- transaction detail lookup
- block detail lookup
This skill does not cover:
- Blockscout GraphQL
- raw JSON-RPC proxying
- write operations or admin/configuration flows
- custom authenticated gateways beyond what the caller explicitly binds
Authentication
Public Blockscout instances usually allow explorer reads without auth.
If you are targeting a self-hosted or gateway-protected instance, configure auth separately with standard uxc auth bindings for that host. This skill does not assume any default credential.
Core Workflow
-
Use the fixed link command by default:
command -v blockscout-openapi-cli- If missing, create it:
uxc link blockscout-openapi-cli https://eth.blockscout.com/api/v2 --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/blockscout-openapi-skill/references/blockscout-v2.openapi.json blockscout-openapi-cli -h
-
Inspect operation schema first:
blockscout-openapi-cli get:/addresses/{address_hash} -hblockscout-openapi-cli get:/tokens/{address_hash} -hblockscout-openapi-cli get:/transactions/{hash} -h
-
Prefer narrow lookup validation before larger history reads:
blockscout-openapi-cli get:/blocks/{block_number_or_hash} block_number_or_hash=latestblockscout-openapi-cli get:/addresses/{address_hash} address_hash=0xd8da6bf26964af9d7eed9e03e53415d37aa96045blockscout-openapi-cli get:/tokens/{address_hash} address_hash=0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
What ships with it
4 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.
- 1mo ago First seen · 105 lines · 35 tokens per session scan A 4ae531256aaa
blockscout-openapi-skill is a skill published in the GitHub repository holon-run/uxc (119 stars, last pushed 1mo ago), licensed MIT. It adds 35 tokens to every session and 1,137 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 2026-08-30.
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