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Signalith

USDT0 outstanding on Polygon PoS

by Fomo · 1 source · a report every 1 h

Signed by Signalith from the provider’s API

Per call
$0.005
sold in packs
Smallest payment
$0.20
what Signalith settles on chain
A report every
1 h
from 1 source
Uptime, 30 days
12.93%
measured by Signalith
Calls, last 30 days
0

Endpoint

GET /v1/feeds/fomo/usdt0-supply-polygon/latest

Bought a pack on this feed? Your code spends it with one header. Make an API key, then use the first example below.

One call
$0.005, sold in packs only
Pack of 50
$0.25, valid 30 days
Pack of 500
$2.50, valid 30 days
History page
5 calls
Pays
0x7c22bbeF…c6210cf7

API key

terminal
# For a pack you already bought. Make a key in the dashboard, under API keys.
curl https://signalith-gw.187-53-130-188.sslip.io/gw/v1/feeds/fomo/usdt0-supply-polygon/latest \
  -H "Authorization: Bearer <your API key>"

# The calls left in your packs.
curl https://signalith-gw.187-53-130-188.sslip.io/gw/v1/packs \
  -H "Authorization: Bearer <your API key>"

HTTP

terminal
# 1. Ask. The answer is 402 with the price, in the PAYMENT-REQUIRED header.
curl -i https://signalith-gw.187-53-130-188.sslip.io/gw/v1/feeds/fomo/usdt0-supply-polygon/latest

# 2. Sign the USDG authorization it describes, then ask again.
curl https://signalith-gw.187-53-130-188.sslip.io/gw/v1/feeds/fomo/usdt0-supply-polygon/latest \
  -H "PAYMENT-SIGNATURE: <base64 payment payload>"

TypeScript

buy.ts
import {Signalith} from '@signalith/sdk'

const signalith = new Signalith({gatewayUrl: 'https://signalith-gw.187-53-130-188.sslip.io/gw', account, maxSpendUsdg: 5_000_000n})

const report = await signalith.read('fomo/usdt0-supply-polygon') // pays, or spends a pack, by itself
report.value      // 2 decimals, a bigint
report.checks     // already verified: signer, kind, decimals, payload, age

TypeScript, with an API key

read.ts
import {Signalith} from '@signalith/sdk'

// No wallet on the server: the key spends calls you bought ahead and cannot buy more.
const signalith = new Signalith({gatewayUrl: 'https://signalith-gw.187-53-130-188.sslip.io/gw', apiKey: process.env.SIGNALITH_API_KEY})

const report = await signalith.read('fomo/usdt0-supply-polygon') // one call from your pack, nothing signed
report.value      // 2 decimals, a bigint
report.callsLeft  // what the pack still holds

Solidity

Example.sol
import {SignalithConsumer} from "@signalith/contracts/src/SignalithConsumer.sol";

contract Example is SignalithConsumer {
    bytes32 constant USDT0_SUPPLY_POLYGON = 0xb6d2ae79b3794237f5a82936971603a1fbf69811f34342e5bc5ad404b7a57284;

    function settle(bytes calldata report, bytes calldata sig) external {
        int256 value = _readOnce(USDT0_SUPPLY_POLYGON, report, sig, Policy({
            maxAgeSec: 7200,
            allowedKinds: KIND_MANAGED,
            minValue: 0,
            maxValue: type(int256).max
        }));
        // use value, scaled by 2 decimals
    }
}

Agents (MCP)

mcp.json
{
  "mcpServers": {
    "signalith": {
      "command": "npx",
      "args": ["-y", "@signalith/mcp"],
      "env": {"SIGNALITH_GATEWAY_URL": "https://signalith-gw.187-53-130-188.sslip.io/gw", "SIGNALITH_PRIVATE_KEY": "<a wallet made for this agent>", "SIGNALITH_MAX_SPEND_USDG": "1000000"}
    }
  }
}

Agents (MCP), with an API key

mcp.json
{
  "mcpServers": {
    "signalith": {
      "command": "npx",
      "args": ["-y", "@signalith/mcp"],
      "env": {"SIGNALITH_GATEWAY_URL": "https://signalith-gw.187-53-130-188.sslip.io/gw", "SIGNALITH_API_KEY": "<your API key>"}
    }
  }
}

Response schema

schema.json
{
  "type": "object",
  "title": "USDT0 outstanding on Polygon PoS",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "value",
    "observedAtMs"
  ],
  "properties": {
    "value": {
      "type": "string"
    },
    "observedAtMs": {
      "type": "string"
    }
  }
}