# Services from api.seneschal.space on Zero

> api.seneschal.space serves 33 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.seneschal.space
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.seneschal.space/health.json

## Services

- [Seneschal Proposer Payment Query](https://www.zero.xyz/c/seneschal-proposer-payment-query-41563f54/llms.txt): $0.001/call via x402. Returns the actual ETH payment received by the latest Ethereum block proposer (priority fees + direct coinbase transfers) along with 1-hour aggregate statistics
- [Seneschal ZEC Supply by Value Pool](https://www.zero.xyz/c/seneschal-zec-supply-by-value-pool-82dc33c9/llms.txt): $0.001/call via x402. Returns the current Zcash (ZEC) total supply broken down by value pool (transparent, sprout, sapling, orchard, ironwood, lockbox) including NU6.3 Ironwood migration progress from a live zebra node.
- [Seneschal Builder Bids & Proposer Payment Export](https://www.zero.xyz/c/seneschal-builder-bids-proposer-payment-export-f1b14229/llms.txt): $0.05/call via x402. Returns per-slot Ethereum block builder bids and realised proposer payments (priority + coinbase fees) as CSV or JSON lines over a specified block range or rolling time window
- [Seneschal Builder Bid Distribution Stats](https://www.zero.xyz/c/api-seneschal-space-164a8893/llms.txt): $0.1/call via x402. Returns per-builder MEV bid distribution percentiles (p25/median/p75/p90/p99/max) and hourly slot activity histogram so searchers can tune bundle pricing to land in a specific builder.
- [Seneschal Counter-MEV Risk Feed](https://www.zero.xyz/c/seneschal-counter-mev-risk-feed-da7a21cd/llms.txt): $0.05/call via x402. Returns a risk-scored feed of malicious ERC-20 approval spenders, honeypot/bait tokens, and dangling live approvals detected on Ethereum mainnet
- [Seneschal Fee History Export](https://www.zero.xyz/c/seneschal-fee-history-export-d17afa81/llms.txt): $0.05/call via x402. Returns per-block Ethereum base fee and blob fee history (up to 1024 blocks) as CSV or JSON lines, sourced directly from eth_feeHistory consensus data
- [Seneschal DeFi Liquidation Opportunities](https://www.zero.xyz/c/api-seneschal-space-df1bc360/llms.txt): $0.05/call via x402. Returns top at-risk borrowers across Aave, Morpho, and Spark ranked by expected value, including realized market success rate, average actual profit in USD, and the most likely winning builder for each position.
- [Seneschal Puzzle/Bounty Contract Risk Feed](https://www.zero.xyz/c/seneschal-puzzle-bounty-contract-risk-feed-839ca79f/llms.txt): $0.05/call via x402. Returns an annotated watchlist of on-chain puzzle, CTF, and bounty contracts classified by payout risk (locked, front-run bait, owner-only, claimable, etc.) with ETH at stake and front-run verdicts.
- [Seneschal Address Risk Check](https://www.zero.xyz/c/seneschal-address-risk-check-37996bc3/llms.txt): $0.001/call via x402. Checks whether a given Ethereum address is a known approval-drainer or honeypot token, returning a risk score, risk band, and top flags.
- [Seneschal Ethereum Base Fee Live Query](https://www.zero.xyz/c/seneschal-ethereum-base-fee-live-query-2ebf62de/llms.txt): $0.001/call via x402. Returns the current Ethereum mainnet base fee and blob base fee for the latest block, plus the protocol-computed next-block fee projections using EIP-1559/EIP-4844 arithmetic.
- [Seneschal Block Value API](https://www.zero.xyz/c/seneschal-block-value-api-ce9e7fc9/llms.txt): $0.001/call via x402. Returns a statistical snapshot of Ethereum block value (MEV + fees) over a recent time window at a given percentile.
- [Seneschal Monero Chain Height](https://www.zero.xyz/c/api-seneschal-space-4a0a8d9b/llms.txt): $0.001/call via x402. Returns the current Monero blockchain height and sync status from a live monerod node
- [Seneschal XMR Last Block Info](https://www.zero.xyz/c/api-seneschal-space-b839acf9/llms.txt): $0.001/call via x402. Returns the timestamp, age, hash, difficulty, and size of the most recently mined Monero block.
- [Seneschal XMR Mempool Count](https://www.zero.xyz/c/api-seneschal-space-514483c5/llms.txt): $0.001/call via x402. Returns the current number of pending (unconfirmed) transactions in the Monero mempool.
- [Seneschal Zcash Chain Height](https://www.zero.xyz/c/api-seneschal-space-64b05dae/llms.txt): $0.001/call via x402. Returns the current Zcash blockchain height, verification progress, and best block hash from a live zebra node.
- [Seneschal Zcash Last Block Info](https://www.zero.xyz/c/api-seneschal-space-3d78a305/llms.txt): $0.001/call via x402. Returns the timestamp, age, hash, difficulty, and size of the most recent Zcash block.
- [Seneschal Private Watch — Monero/Zcash Payment Webhook](https://www.zero.xyz/c/seneschal-private-watch-monero-zcash-payment-webhook-92e53760/llms.txt): $0.1/call via x402. Registers a view-key-based watcher on a Monero or Zcash address and fires an HMAC-signed webhook to your URL the moment an inbound payment arrives.
- [Seneschal Private Relay — Ethereum Private Transaction Submission](https://www.zero.xyz/c/seneschal-private-relay-ethereum-private-transaction-submission-6d8f122d/llms.txt): $0.5/call via x402. Submits a locally-signed raw Ethereum transaction privately to block builders, bypassing the public mempool to prevent frontrunning and sandwich attacks.
- [Seneschal Monero Fee Estimate](https://www.zero.xyz/c/seneschal-monero-fee-estimate-6cde00f0/llms.txt): $0.001/call via x402. Returns the current recommended transaction fee for the Monero network, including fee-per-byte and estimated total fee at various priority levels.
- [Seneschal XMR Fee Rate](https://www.zero.xyz/c/api-seneschal-space-0d384e98/llms.txt): $0.001/call via x402. Returns the current recommended Monero transaction fee in piconero per byte (and per kB) for optimal transaction inclusion.
- [Seneschal Private Watch Top-Up](https://www.zero.xyz/c/seneschal-private-watch-top-up-baf5b89f/llms.txt): $0.1/call via x402. Add credit to an existing Seneschal private watch monitor for Monero or Zcash payment detection, extending its active watching period.
- [Seneschal Private Historical Chain Scan](https://www.zero.xyz/c/seneschal-private-historical-chain-scan-60fcc756/llms.txt): $0.5/call via x402. Scan historical Monero or Zcash blockchain data using a view key to retrieve past transactions and notes for a given address up to a specified block height
- [Seneschal Private Watch — $5 Top-Up](https://www.zero.xyz/c/seneschal-private-watch-5-top-up-f48eb8a0/llms.txt): $5/call via x402. Adds $5 USD of credit to an existing Monero/Zcash payment watch subscription, paid via x402 USDC on Base
- [Seneschal Private Watch Top-Up](https://www.zero.xyz/c/seneschal-private-watch-top-up-e6baa841/llms.txt): $1/call via x402. Adds credit to an existing Monero/Zcash payment watch subscription, keeping the watch active so webhooks continue to fire when payments arrive.
- [Seneschal Recent Liquidations Feed](https://www.zero.xyz/c/seneschal-recent-liquidations-feed-d39ec32c/llms.txt): $0.001/call via x402. Returns a feed of the most recent DeFi liquidation events on Ethereum mainnet, sourced from Seneschal's block builder telemetry.
- [Seneschal Top Ethereum Block Builder Query](https://www.zero.xyz/c/seneschal-top-ethereum-block-builder-query-068bd2f2/llms.txt): $0.001/call via x402. Returns the current top Ethereum mainnet block builder based on live block-building telemetry data
- [Seneschal Liquidatable Positions Telemetry](https://www.zero.xyz/c/seneschal-liquidatable-positions-telemetry-cc4d20af/llms.txt): $0.001/call via x402. Returns real-time data on liquidatable DeFi positions on Ethereum mainnet, useful for MEV bots, liquidators, and block builders.
- [Zcash Mempool Stats](https://www.zero.xyz/c/api-seneschal-space-4722573f/llms.txt): $0.001/call via x402. Returns the current Zcash mempool transaction count and total size in bytes as a single-fact snapshot.
- [Seneschal Builder Bid Query](https://www.zero.xyz/c/seneschal-builder-bid-query-53979979/llms.txt): $0.001/call via x402. Retrieves the current Ethereum mainnet block builder bid from Seneschal's MEV-boost compatible block builder
- [Seneschal Data Freshness Check](https://www.zero.xyz/c/seneschal-data-freshness-check-c62db5b8/llms.txt): $0.001/call via x402. Returns metadata about how current the Seneschal service's data is, useful for verifying API health and data staleness before relying on payment watch or block builder outputs.
- [Seneschal Ethereum Block Builder Share Query](https://www.zero.xyz/c/seneschal-ethereum-block-builder-share-query-95a6dab3/llms.txt): $0.001/call via x402. Retrieves current builder share and MEV telemetry data from Seneschal's Ethereum mainnet block builder.
- [Seneschal At-Risk Count](https://www.zero.xyz/c/seneschal-at-risk-count-d917ce49/llms.txt): $0.001/call via x402. Returns the current count of Ethereum positions at risk of liquidation, providing free liquidation telemetry for DeFi monitoring.
- [Seneschal Cheapest Flashloan Query](https://www.zero.xyz/c/seneschal-cheapest-flashloan-query-65c9a75a/llms.txt): $0.001/call via x402. Returns the cheapest available flash loan offer across DeFi protocols on Ethereum mainnet

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)