What CHANGED on the board since your last check — change detection for polling agents
What CHANGED on the board since your last check — change detection for polling agents. Pass ?since=<hash from the FREE /api/board/state> for the deltas: names entering or leaving the READY pool, per-name trend, light, leadership and hold-band flips, and any regime or permission-ladder move per book (S&P 500, Nasdaq-100, macro). Poll the hash free, buy the diff only when it moves — an unchanged hash is answered free, never billed. Recomputes ~5 min in market hours. Research, not advice.
10000 (raw units)
price
5
calls / 30d
1
unique payers
2026-09-12
updated
Provider
coil.trade · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x7B53524d5c5D29EfB8C1d128C56F62FE38Cd9476",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 3600
},
{
"scheme": "exact",
"network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
"payTo": "LYIVIUSN3FAFIC2NUN6UYU2VN764U6YTCPTIX2O6EWYYU5WHAJHYMVTZM4",
"asset": "31566704",
"amount": "10000",
"maxTimeoutSeconds": 3600
},
{
"scheme": "exact",
"network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k",
"payTo": "LYIVIUSN3FAFIC2NUN6UYU2VN764U6YTCPTIX2O6EWYYU5WHAJHYMVTZM4",
"asset": "31566704",
"amount": "10000",
"maxTimeoutSeconds": 3600
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "5HGarauHaGFynzwNBqLkKcQ4LFR4UCXKZE7bJuP6Ew2N",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"maxTimeoutSeconds": 3600
},
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x7B53524d5c5D29EfB8C1d128C56F62FE38Cd9476",
"asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amount": "10000",
"maxTimeoutSeconds": 604800
}
]Output schema
{
"bazaar": {
"category": "financial-data",
"discoverable": true,
"info": {
"input": {
"method": "GET",
"queryParams": {
"since": "the state_hash you stored from a previous /api/board/state poll"
},
"type": "http"
},
"output": {
"example": {
"candidates": {
"entered": [
"GWW",
"XLRE"
],
"left": [],
"unchanged": 4
},
"changed": true,
"elapsed_seconds": 3960,
"freshness": {
"data_age_seconds": 142,
"market_open": true,
"next_refresh_at": "<ISO-8601 UTC — always present; do not re-buy before this>",
"poll_hint": "Market open — this board recomputes about every 5 minutes; polling faster returns the same payload."
},
"names": {
"buy_ok": [],
"hold_band": [],
"leadership": [],
"light": [],
"state": [
{
"from": "building",
"sym": "MU",
"to": "firing"
}
]
},
"now": {
"asof_daily": "2026-07-22",
"at": "2026-07-22T15:11:00.000Z",
"hash": "9af3c1d0b7e25a44"
},
"product": "coil-diff",
"regime": [
{
"book": "spx",
"field": "ladder_rung",
"from": "SECTOR",
"to": "NAMES"
}
],
"since": {
"asof_daily": "2026-07-22",
"at": "2026-07-22T14:05:00.000Z",
"hash": "6d684695262bfeca"
},
"summary": "SPX ladder_rung SECTOR -> NAMES; 2 entered the READY pool (GWW, XLRE); 6 state changes"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
},
"tags": [
"change-detection",
"what-changed",
"board-diff",
"delta",
"state-change",
"polling",
"market-alerts",
"trading-signals",
"sp500",
"nasdaq-100",
"equities",
"trading",
"financial-data"
]
},
"sign-in-with-x": {
"info": {
"domain": "coil.trade",
"expirationTime": "2026-09-12T14:41:17.839Z",
"issuedAt": "2026-09-12T14:31:17.839Z",
"nonce": "0608760ded8bb4051b6e24098f6b1302",
"resources": [
"https://coil.trade/api/board/diff"
],
"statement": "Sign in to Coil - free-tier board access for this wallet (25 calls/day on regime, indices, movers, crypto gate, crypto night, tradfi-risk, hold state). This signature proves address control only; no funds move.",
"uri": "https://coil.trade/api/board/diff",
"version": "1"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"address": {
"type": "string"
},
"chainId": {
"type": "string"
},
"domain": {
"type": "string"
},
"expirationTime": {
"format": "date-time",
"type": "string"
},
"issuedAt": {
"format": "date-time",
"type": "string"
},
"nonce": {
"type": "string"
},
"notBefore": {
"format": "date-time",
"type": "string"
},
"requestId": {
"type": "string"
},
"resources": {
"items": {
"format": "uri",
"type": "string"
},
"type": "array"
},
"signature": {
"type": "string"
},
"statement": {
"type": "string"
},
"type": {
"type": "string"
},
"uri": {
"format": "uri",
"type": "string"
},
"version": {
"type": "string"
}
},
"required": [
"domain",
"address",
"uri",
"version",
"chainId",
"type",
"nonce",
"issuedAt",
"signature"
],
"type": "object"
},
"session": "one signed SIGN-IN-WITH-X header is a bearer session: replay it as-is across every free-tier endpoint until expirationTime (issuedAt + 10 min), then re-sign from any fresh 402. Quota: 25 served reads/day per address (tier.used_today in each 200); signing costs nothing and moves no funds.",
"supportedChains": [
{
"chainId": "eip155:8453",
"type": "eip191"
},
{
"chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"type": "ed25519"
}
]
},
"x402-merchant": {
"info": {
"categories": [
"market-data",
"trading-signals",
"crypto-signals",
"financial-data",
"stock-scanner",
"algorand",
"x402",
"x402-global-challenge"
],
"logo": "https://coil.trade/assets/img/icon-512.png",
"name": "Coil",
"website": "https://coil.trade"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"categories": {
"items": {
"type": "string"
},
"type": "array"
},
"logo": {
"type": "string"
},
"name": {
"type": "string"
},
"website": {
"type": "string"
}
},
"required": [
"name"
],
"type": "object"
}
}
}Use it
curl
curl "https://coil.trade/api/board/diff" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://coil.trade/api/board/diff");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://coil.trade/api/board/diff")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/1213.json, and this resource appears in /discovery/resources and /discovery/search.