How do I install the Skill 11 Oracle Data Feeds skill?

Run npx skillmds@latest add vaquarkhan/skill-11-oracle-data-feeds in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Is Skill 11 Oracle Data Feeds free to use?

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Who published Skill 11 Oracle Data Feeds?

vaquarkhan (@vaquarkhan) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Skill 11 Oracle Data Feeds by vaquarkhan

Name: Skill 11 Oracle Data Feeds
Author: vaquarkhan

Skill 11 Oracle Data Feeds

Integrates oracle and data feed services including Chainlink and Pyth price feeds, VRF randomness, and Chainlink Automation keepers. Use when consuming on-chain price data, random numbers, or conditional automation.

vaquarkhan Updated Sep 17, 2026

File contents

Oracle & Data Feeds

When to Use

Reading price feeds for DeFi calculations
Requesting verifiable random numbers (VRF)
Setting up Chainlink Automation (keepers)
Validating oracle freshness and deviation thresholds
Comparing multi-oracle prices for manipulation detection

Prerequisites

MCP: price-feed-server, blockchain-rpc-server
Skill-08 for oracle manipulation risk assessment

Workflow

1. Chainlink Price Feeds

AggregatorV3Interface feed = AggregatorV3Interface(aggregatorAddress);
(, int256 price, , uint256 updatedAt, ) = feed.latestRoundData();

Validation checks:

updatedAt within heartbeat (varies: 1h ETH/USD, 24h long-tail)
price > 0
Compare with Pyth/CoinGecko — flag if deviation > 2%

Feed addresses: see knowledge-base/protocols/ and Chainlink docs per chain.

2. Pyth Network

Pull model: update price feeds in same tx via getUpdateData()
Hermes API for off-chain price reads
Lower latency than push oracles for L2s

3. Chainlink VRF v2.5

Subscribe or direct funding
Request randomness: requestRandomWords(keyHash, subId, minConfirmations, callbackGasLimit, numWords)
Fulfill in callback: fulfillRandomWords(requestId, randomWords)
Never use block variables (blockhash, timestamp) for randomness

4. Chainlink Automation

Type	Use Case
Time-based	Periodic harvest, rebalance
Custom logic	`checkUpkeep()` returns upkeepNeeded
Log trigger	React to specific events

5. Oracle Security

Use multiple sources for critical decisions (liquidations, minting)
Implement staleness checks and circuit breakers
TWAP for AMM-derived prices (minimum 30-minute window)
Never use spot DEX price as sole oracle for high-value ops

References

references/chainlink-feeds.md
references/pyth-integration.md
price-feed-server MCP tools

---name: skill-11-oracle-data-feedsdescription: Integrates oracle and data feed services including Chainlink and Pyth price feeds, VRF randomness, and Chainlink Automation keepers. Use when consuming on-chain price data, random numbers, or conditional automation.---# Oracle & Data Feeds## When to Use- Reading price feeds for DeFi calculations- Requesting verifiable random numbers (VRF)- Setting up Chainlink Automation (keepers)- Validating oracle freshness and deviation thresholds- Comparing multi-oracle prices for manipulation detection## Prerequisites- MCP: `price-feed-server`, `blockchain-rpc-server`- Skill-08 for oracle manipulation risk assessment## Workflow### 1. Chainlink Price Feeds```solidityAggregatorV3Interface feed = AggregatorV3Interface(aggregatorAddress);(, int256 price, , uint256 updatedAt, ) = feed.latestRoundData();```**Validation checks:**- `updatedAt` within heartbeat (varies: 1h ETH/USD, 24h long-tail)- `price > 0`- Compare with Pyth/CoinGecko — flag if deviation > 2%Feed addresses: see `knowledge-base/protocols/` and Chainlink docs per chain.### 2. Pyth Network- Pull model: update price feeds in same tx via `getUpdateData()`- Hermes API for off-chain price reads- Lower latency than push oracles for L2s### 3. Chainlink VRF v2.51. Subscribe or direct funding2. Request randomness: `requestRandomWords(keyHash, subId, minConfirmations, callbackGasLimit, numWords)`3. Fulfill in callback: `fulfillRandomWords(requestId, randomWords)`4. Never use block variables (`blockhash`, `timestamp`) for randomness### 4. Chainlink Automation| Type | Use Case ||------|----------|| Time-based | Periodic harvest, rebalance || Custom logic | `checkUpkeep()` returns upkeepNeeded || Log trigger | React to specific events |Register upkeep with LINK funding; monitor balance.### 5. Oracle Security- Use multiple sources for critical decisions (liquidations, minting)- Implement staleness checks and circuit breakers- TWAP for AMM-derived prices (minimum 30-minute window)- Never use spot DEX price as sole oracle for high-value ops## References- `references/chainlink-feeds.md`- `references/pyth-integration.md`- `price-feed-server` MCP tools

Frequently asked questions