chainlink-data-streams-skill

chainlink-data-streams-skill is a skill for Claude Code, Codex from smartcontractkit/chainlink-agent-skills. It costs 110 tokens per session (2,579 once invoked), scanned A, original, MIT.

A development guide for Chainlink Data Streams, a service that provides signed, frequently updated market-data reports to applications. It covers retrieving, decoding, storing, displaying, and verifying those reports in supported programming languages and blockchain environments.

In plain words
What is it for?
Use it to fetch reports through REST or WebSockets, build high-availability streams, decode report schemas, persist data in SQLite, display live data in a frontend, and verify reports onchain.
Why use it?
It helps developers choose the right way to access Data Streams while keeping credentials and side effects out of the agent's runtime. It also provides guidance for report formats and authentication problems.

Skill for Claude CodeCodex

Written for Claude Code and Codex: allowed-tools in frontmatter, but also agents/openai.yaml present. Also seen: mentions Claude Code; mentions Codex.

Install

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.

agentmods
npx agentmods add skills/smartcontractkit/chainlink-agent-skills/chainlink-data-streams-skill
Any agent
npx skills add smartcontractkit/chainlink-agent-skills --skill chainlink-data-streams-skill
Clone the repo
git clone --depth 1 https://github.com/smartcontractkit/chainlink-agent-skills

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 chainlink-data-streams-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/smartcontractkit/chainlink-agent-skills/chainlink-data-streams-skill.svg)](https://agentmods.dev/skills/smartcontractkit/chainlink-agent-skills/chainlink-data-streams-skill)
Your own site
<a href="https://agentmods.dev/skills/smartcontractkit/chainlink-agent-skills/chainlink-data-streams-skill"><img src="https://agentmods.dev/badge/skills/smartcontractkit/chainlink-agent-skills/chainlink-data-streams-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,579 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00110 $0.02579
Opus 5 $0.00055 $0.01290
Sonnet 5 $0.00022 $0.00516
Haiku 4.5 $0.00011 $0.00258

Measured 6d ago against content hash 49e49ad3cbad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

chainlink-data-streams-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 6d 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.

chainlink-data-streams-skill/SKILL.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Overview

Route Data Streams requests to the simplest valid path while keeping side effects and credential exposure out of the agent runtime.

Progressive Disclosure

  1. Keep this file as the default guide.
  2. Read references/credentials-and-auth.md only when the user asks how to get Data Streams credentials, how authentication works, how to configure API keys, or how to debug auth failures.
  3. Read references/report-schemas.md only when the user asks about report schema versions, schema fields, deprecated or available schemas, report decoding, or how to choose the correct decoder.
  4. Read references/rest-sdk.md only when the user wants Go, Rust, or TypeScript code to fetch reports through REST, including latest reports, timestamp lookups, bulk lookups, or paginated history.
  5. Read references/websocket-sdk.md only when the user wants Go, Rust, or TypeScript code to stream reports through WebSockets, with or without High Availability mode.
  6. Read references/onchain-verification.md only when the user wants EVM, Solana, or Stellar code that verifies Data Streams reports onchain, wants Chainlink Local mock testing for Data Streams verification, or wants review/debugging of verification code.
  7. Read references/frontend-and-storage.md only when the user wants a real-time frontend, candlestick display, local SQLite persistence, or local report history tracking.
  8. Read references/public-endpoints-and-addresses.md only when the user needs public REST/WebSocket/candlestick endpoint defaults, supported-network verifier proxy/program IDs, or an offline fallback for those public details.
  9. Read references/official-sources.md only when the answer depends on live Data Streams facts: current endpoint behavior, feed IDs, schema availability, deprecation status, SDK package versions, verifier addresses, supported networks, or current docs.
  10. Do not load reference files speculatively.

Read the full file on GitHub · 143 lines

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. 6d ago First seen · 143 lines · 110 tokens per session scan A 49e49ad3cbad

Subscribe to this mod's changes

chainlink-data-streams-skill is a skill published in the GitHub repository smartcontractkit/chainlink-agent-skills (125 stars, last pushed yesterday), licensed MIT. It adds 110 tokens to every session and 2,579 once invoked, about $0.0006 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 2026-08-30.

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