--- name: api.myceliasignal.com description: api.myceliasignal.com provides signed oracle data for crypto market conditions, including ETH/EUR price attestations, a market stress index, and gas price feeds for Base, Arbitrum, and Polygon. All signed outputs use Ed25519 attestations suitable for on-chain verification or oracle ingestion. Gas oracle endpoints return unsigned operational data aggregated from multiple RPC sources. host: api.myceliasignal.com --- # api.myceliasignal.com Mycelia Signal is a paid oracle API serving agents and smart contracts that need cryptographically verifiable market data or real-time network fee estimates. It covers a narrow but precise set of outputs: one signed price pair (ETH/EUR), one signed macro stress index, and three chain-specific gas oracles. It is not a general-purpose price feed or DEX aggregator — its value is in attestation quality and multi-source aggregation rather than breadth of coverage. ## When to use this host Use this host when an agent requires Ed25519-signed, verifiable oracle data for ETH/EUR pricing or market stress classification, or when it needs current gas fee estimates for Base, Arbitrum, or Polygon. The signed outputs are specifically suited for on-chain oracle consumption or audit trails requiring cryptographic attestation. Do not use this host for: ETH/USD, BTC/EUR, or any other trading pair beyond ETH/EUR; Ethereum mainnet gas data; historical price or gas analysis; unsigned or free preview data (use the host's own /preview endpoints for that); or broad token price coverage (use a general price feed API such as CoinGecko or a DEX aggregator instead). The gas oracles are chain-specific and non-interchangeable — always select the skill matching the target network. ## Capabilities ### Signed Price Oracles Provides cryptographically signed, verifiable price and market-condition data suitable for on-chain oracle feeds or agent risk logic. Outputs include Ed25519 signatures, public keys, and canonical payloads. - **`fetch-eth-eur-oracle-price`** — Returns a signed ETH/EUR price attestation computed via hybrid median across direct EUR pairs and cross-rates, with Ed25519 signature for on-chain or oracle verification. - **`fetch-market-stress-index`** — Returns a signed market-wide Mycelia Signal Stress Index (0–100) with regime classification, component breakdown, and Ed25519 attestation, paid via x402 on Base. ### EVM Gas Oracles Returns current gas price data (Gwei, base fee, estimated USD cost) for three EVM networks — Base, Arbitrum, and Polygon — aggregated from multiple RPC sources to support transaction cost estimation and submission decisions. - **`fetch-base-gas-oracle`** — Returns current gas price oracle data for the Base network, including gas price in Gwei, base fee, estimated transaction cost in USD, and ETH price, aggregated from multiple RPC sources. - **`fetch-arbitrum-gas-oracle`** — Returns current Arbitrum gas price, base fee, estimated transaction cost in ETH and USD, and native ETH price from multiple RPC sources. - **`fetch-polygon-gas-oracle`** — Returns live Polygon network gas price data including gas price in Gwei, base fee, estimated transaction cost in POL and USD, and the data sources used. ## Workflows ### Pre-Transaction Cost and Stress Check *Use when an agent needs to decide whether to submit a transaction on Base, Arbitrum, or Polygon under current market conditions — combining network fee data with a macro stress reading to gate execution.* 1. **`fetch-market-stress-index`** — Retrieve the signed MSSI stress score and regime classification to determine whether market conditions are within acceptable risk thresholds for execution. 2. **`fetch-base-gas-oracle`** — If targeting Base, fetch current gas price and estimated USD transaction cost to confirm fees are within budget before submitting. ### ETH/EUR Oracle Feed with Stress Context *Use when an agent needs to price ETH in EUR for a smart contract or risk model and also wants a macro stress signal to contextualize the price reading.* 1. **`fetch-eth-eur-oracle-price`** — Fetch the signed ETH/EUR price attestation for use in oracle ingestion or contract feed. 2. **`fetch-market-stress-index`** — Fetch the signed MSSI to provide regime context (e.g., high volatility, stablecoin peg deviation) alongside the price data. ## Skill reference ### `fetch-eth-eur-oracle-price` **ETH/EUR Oracle Price** — Returns a signed ETH/EUR price attestation computed via hybrid median across direct EUR pairs and cross-rates, with Ed25519 signature for on-chain or oracle verification. *Use when:* Use when an agent needs a cryptographically signed, current ETH price in EUR from multiple sources (Bitstamp, Coinbase, Kraken, cross-rate) for oracle ingestion, smart contract feeds, or verifiable market data. *Not for:* Do not use for unsigned or preview price data (no payment required for that); not suitable for other trading pairs such as ETH/USD or BTC/EUR — use the corresponding pair endpoints instead. **Returns:** Returns a JSON object with domain ETHEUR, a pipe-delimited canonical string encoding the ETH/EUR price (e.g. 1878.36), sources, hybrid_median method, timestamp, nonce, plus Ed25519 signature and pubkey fields. **Example:** `GET https://api.myceliasignal.com/oracle/price/eth/eur` --- ### `fetch-base-gas-oracle` **Base Gas Oracle** — Returns current gas price oracle data for the Base network, including gas price in Gwei, base fee, estimated transaction cost in USD, and ETH price, aggregated from multiple RPC sources. *Use when:* Use when an agent needs current Base network gas prices to estimate transaction costs, set gas limits, or decide whether to submit a transaction based on current fee conditions. *Not for:* Do not use for gas data on other EVM networks (e.g., Ethereum mainnet, Polygon); use a network-specific gas oracle instead. Not suitable for historical gas price analysis. **Returns:** Returns a JSON object with Base network gas price in Gwei, base fee, estimated ETH transfer cost in USD, current ETH/USD price, aggregating RPC sources, plus a signed canonical payload for integrity verification. **Example:** `GET https://api.myceliasignal.com/oracle/gas/base` --- ### `fetch-arbitrum-gas-oracle` **Arbitrum Gas Oracle** — Returns current Arbitrum gas price, base fee, estimated transaction cost in ETH and USD, and native ETH price from multiple RPC sources. *Use when:* Use when an agent needs current Arbitrum gas data to estimate transaction costs, display gas prices, or decide whether to submit a transaction based on current network conditions. *Not for:* Do not use for Ethereum mainnet or other EVM chain gas data; call the corresponding chain-specific oracle endpoint instead. Not suitable for historical gas analysis. **Returns:** Returns a JSON object with Arbitrum gas price (0.02 Gwei), base fee, estimated tx cost in ETH and USD, ETH/USD price, source RPC list, aggregation method, timestamp, and a signed canonical string for integrity verification. **Example:** `GET https://api.myceliasignal.com/oracle/gas/arbitrum` --- ### `fetch-polygon-gas-oracle` **Polygon Gas Oracle** — Returns live Polygon network gas price data including gas price in Gwei, base fee, estimated transaction cost in POL and USD, and the data sources used. *Use when:* Use when an agent needs current Polygon gas prices to estimate transaction costs, set gas limits, or decide whether to submit a transaction based on current network conditions. *Not for:* Do not use for gas data on other networks (e.g. Ethereum mainnet, Arbitrum); use a chain-specific gas oracle for those. Not suitable for historical gas price analysis. **Returns:** Returns a JSON object with Polygon gas price in Gwei, base fee, estimated 21000-gas tx cost in POL and USD, native token price, aggregation sources, timestamp, and a signed canonical string for integrity verification. **Example:** `GET https://api.myceliasignal.com/oracle/gas/polygon` --- ### `fetch-market-stress-index` **Market Stress Oracle (MSSI)** — Returns a signed market-wide Mycelia Signal Stress Index (0–100) with regime classification, component breakdown, and Ed25519 attestation, paid via x402 on Base. *Use when:* Use when an agent needs a cryptographically signed, real-time market stress reading — including volatility regime, stablecoin peg deviation, and funding rate extremity — for risk monitoring, position sizing, or pricing decisions. *Not for:* Do not use for individual asset price quotes; use a price oracle endpoint instead. Not suitable for unsigned/free preview data — use /oracle/stress/market/preview for that. **Returns:** Returns a signed MSSI object with value=43.07, regime=ELEVATED, confidence=0.8904, Ed25519 signature, and a components breakdown for volatility, stablecoin stress, and funding rate. **Example:** `GET https://api.myceliasignal.com/oracle/stress/market` ---