ens_expiry

PAID $0.001 (x402, USDC on Base). Resolve an ENS .eth or Basename .base.eth name's registration expiry ON-CHAIN (public RPC). Returns expiry date, days-left, whether it's in the 90-day grace period, the release date it becomes registrable again, and the current owner. Read-only, descriptive. Args: name. Without payment returns the x402 challenge; pass x_payment to settle.

Parameters2

name	string	required	Full ENS name ending in .eth (e.g. vitalik.eth) or .base.eth (e.g. jesse.base.eth).
x_payment	string	optional	x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

Raw schema

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Full ENS name ending in .eth (e.g. vitalik.eth) or .base.eth (e.g. jesse.base.eth)."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "name"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

gas

PAID $0.001 (x402, USDC on Base). Current gas for a chain via public RPC: base fee + suggested priority + suggested max fee (gwei) at the latest block. If below_gwei is set, also returns whether the base fee is at/below your threshold right now. Read-only. Args: chain (ethereum|base|arbitrum|polygon|bsc|optimism), below_gwei (optional). Without payment returns the x402 challenge; pass x_payment to settle.

Parameters3

chain	string	required	Chain to read gas for.
below_gwei	number	optional	Optional threshold: return a boolean of whether base fee is at/below this many gwei now.
x_payment	string	optional	x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

Raw schema

{
  "type": "object",
  "properties": {
    "chain": {
      "type": "string",
      "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "polygon",
        "bsc",
        "optimism"
      ],
      "description": "Chain to read gas for."
    },
    "below_gwei": {
      "type": "number",
      "description": "Optional threshold: return a boolean of whether base fee is at/below this many gwei now."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "chain"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

token_unlocks

PAID $0.003 (x402, USDC on Base). Next token vesting/unlock event(s) from DefiLlama's PUBLIC emissions dataset: upcoming unlock date(s), token amount, and % of max supply, with a human description. Cleanly says so when a token has no public unlock schedule. Read-only, descriptive — NOT a price signal. Args: token (symbol, protocol name, or contract address), chain (optional, for address lookup). Without payment returns the x402 challenge; pass x_payment to settle.

Parameters3

token	string	required	Token symbol (e.g. ARB), protocol name (e.g. arbitrum), or contract address.
chain	string	optional	Chain of the contract address (only used when token is an address).
x_payment	string	optional	x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

Raw schema

{
  "type": "object",
  "properties": {
    "token": {
      "type": "string",
      "description": "Token symbol (e.g. ARB), protocol name (e.g. arbitrum), or contract address."
    },
    "chain": {
      "type": "string",
      "description": "Chain of the contract address (only used when token is an address)."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "token"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

oracle_health

PAID $0.003 (x402, USDC on Base). Chainlink price-feed health via public RPC: last-update age, latest answer (scaled by decimals), round monotonicity (is the answer current?), a stale flag vs the heartbeat, optional deviation vs a reference price, and per-factor flags. Read-only, descriptive. Args: feed_address, chain, heartbeat_seconds (optional), reference (optional). Without payment returns the x402 challenge; pass x_payment.

Parameters5

feed_address	string	required	Chainlink aggregator/proxy address (0x…40-hex), e.g. ETH/USD 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419.
chain	string	required	Chain the feed is deployed on.
heartbeat_seconds	number	optional	The feed's heartbeat in seconds for a precise stale check (optional).
reference	number	optional	A reference price to compute deviation % against (optional).
x_payment	string	optional	x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

Raw schema

{
  "type": "object",
  "properties": {
    "feed_address": {
      "type": "string",
      "description": "Chainlink aggregator/proxy address (0x…40-hex), e.g. ETH/USD 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419."
    },
    "chain": {
      "type": "string",
      "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "polygon",
        "bsc",
        "optimism"
      ],
      "description": "Chain the feed is deployed on."
    },
    "heartbeat_seconds": {
      "type": "number",
      "description": "The feed's heartbeat in seconds for a precise stale check (optional)."
    },
    "reference": {
      "type": "number",
      "description": "A reference price to compute deviation % against (optional)."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID read. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "feed_address",
    "chain"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Tool	Price	What it does
`ens_expiry`	$0.001	Resolve an ENS `.eth` / Basename `.base.eth` name's registration expiry on-chain — expiry date, days-left, 90-day grace status, release date, current owner. Args: `name`.
`gas`	$0.001	Current gas for a chain via public RPC — base fee + suggested priority + max fee (gwei) at the latest block; optional at/below-threshold boolean. Args: `chain`, `below_gwei?`.
`token_unlocks`	$0.003	Next token vesting/unlock event(s) from DefiLlama's public emissions data — date, amount, % of max supply. Cleanly says so when there's no public schedule. Args: `token` (symbol/name/address), `chain?`.
`oracle_health`	$0.003	Chainlink price-feed health — last-update age, latest answer, round monotonicity, stale flag vs heartbeat, optional deviation vs a reference. Args: `feed_address`, `chain`, `heartbeat_seconds?`, `reference?`.

FabTally Chain

io.github.zvmzaretsky/fabtally-chain — Model Context Protocol (MCP) Server

🛠️ Key Features

🚀 Use Cases

ens_expiry

gas

token_unlocks

oracle_health

FabTally Chain — MCP server

Tools (all paid; a call with no payment returns the decoded x402 402 challenge)

Transports

Install

Remote endpoint