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frontend: Skill for Claude Code

.agents/skills/resolve-api-url/SKILL.md

resolve-api-url is a skill for Claude Code, Codex from blockscout/frontend. It costs 52 tokens per session (854 once invoked), scanned A, original, no licence file.

An API URL lookup workflow that maps a service name and deployed instance to the full address used for requests.

In plain words
What is it for?
Use it to find the real request URL or fetch a sample response from a deployed API resource.
Why use it?
It prevents requests from being sent to an assumed or incomplete address when working with a live Blockscout instance.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is blockscout/frontend's own configuration. It tells Claude Code and Codex how to work on frontend itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything frontend configures →

not rated 310repo yesterday A scan 52 tokens custom licence
View source ↗ blockscout/frontend eth.blockscout.com
Reuse

Borrowing it

Nothing to install: this file belongs to blockscout/frontend. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/blockscout/frontend/main/.agents/skills/resolve-api-url/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/blockscout/frontend

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for resolve-api-url

README.md
[![agentmods](https://agentmods.dev/badge/skills/blockscout/frontend/resolve-api-url/github.svg)](https://agentmods.dev/skills/blockscout/frontend/resolve-api-url)
Your own site
<a href="https://agentmods.dev/skills/blockscout/frontend/resolve-api-url"><img src="https://agentmods.dev/badge/skills/blockscout/frontend/resolve-api-url/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.

agentmods 80×15 button for resolve-api-url

Your own site · 80×15
<a href="https://agentmods.dev/skills/blockscout/frontend/resolve-api-url"><img src="https://agentmods.dev/badge/skills/blockscout/frontend/resolve-api-url.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 854 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.00854
Opus 5.5 $0.00021 $0.00342
Sonnet 5.5 $0.00010 $0.00171
Haiku 4.5 $0.00005 $0.00085

Measured 2mo ago against content hash b2c986d7df5e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

resolve-api-url 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 2mo 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.

.agents/skills/resolve-api-url/SKILL.md · 70 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. 2mo ago First seen · 70 lines · 52 tokens per session scan A b2c986d7df5e

Subscribe to this mod's changes

resolve-api-url is a skill published in the GitHub repository blockscout/frontend (310 stars, last pushed yesterday), with no licence file. It adds 52 tokens to every session and 854 once invoked, about $0.0002 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 2026-09-03.

Backend and APIsblockchainethereumexplorer
Related

resolve-api-url compared with skills from other repositories

resolve-api-url next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
resolve-api-urlblockscout/frontendSkill310yesterdaynoneA52Claude Code, Codex
alchemy-apialchemyplatform/alchemy-claude-pluginSkill715d agoMITA160Claude Code
analyzing-ethereum-smart-contract-vulnerabilitiesmukul975/Anthropic-Cybersecurity-SkillsSkill36k2mo agoApache-2.0A49Claude Code
analyzing-ethereum-smart-contract-vulnerabilitiesxalgorix/xalgorixSkill1.3kyesterdayApache-2.0A49Claude Code, Codex
blockchain-ethereumj4flmao/agent-skillsSkill383d agoMITA242Claude Code, Codex
lineth-quickstartLFDT-Lineth/lineth-monorepoSkill127todayApache-2.0A228Claude Code, Codex
blockchain-expertpersonamanagmentlayer/pclSkill4411d agoApache-2.0A63Claude Code