almanac.locomot.io
Verified reality, a trust layer, and a deterministic workbench for AI agents — facts (sky, field, time, verse), fair randomness, beacon timestamps, timelock sealing, sealed-bid auctions, plus citations, proofreading, readability, diffs, parsing, unit conversion and signature recovery. Pay-per-call over x402 on Base; every answer reproducible and signed. Trust you can verify.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": "https://almanac.locomot.io/llms.txt",
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xa3091005a76b1480F1897a9D0C2e1c55B7767674",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": "https://almanac.locomot.io/field",
"price_usd": 0.002,
"parameters": {
"note": "send these as query parameters on the SAME url; a paid request missing any of them answers 422 and takes no money",
"optional": [
{
"name": "altitude_km"
},
{
"name": "when",
"about": "ISO-8601, decimal year, or 'now'"
},
{
"name": "notarize",
"about": "also drand-timestamp the answer"
}
],
"required": [
{
"name": "lat"
},
{
"name": "lon"
}
]
},
"description": "Deterministic WMM2025 magnetic field (one location/date). Free sample, no payment required: GET /play/field",
"free_sample": "https://almanac.locomot.io/play/field",
"x402Version": 2,
"sample_response": {
"url": "https://almanac.locomot.io/field/example",
"note": "free, and it IGNORES your parameters -- a fixed input, so you can see the exact response shape before paying"
},
"pay_once_instead": {
"buy": "POST https://almanac.locomot.io/credits (x402, $1.00 buys $1.20 of credit)",
"why": "one payment, then no wallet and no signature per call",
"then": "call this same URL with header Authorization: Bearer tsk_...",
"balance": "GET https://almanac.locomot.io/credits/balance (free)"
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.002 USDC on Base to 0xa309…67674. The signed payment is good for 5 minutes.
- Paid to
- 0xa309…67674
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xa3091005a76b1480F1897a9D0C2e1c55B7767674",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lat": 40.7128,
"lon": -74.006
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"lat",
"lon"
],
"properties": {
"lat": {
"type": "number",
"maximum": 90,
"minimum": -90
},
"lon": {
"type": "number",
"maximum": 180,
"minimum": -180
},
"when": {
"type": "string",
"description": "ISO date / decimal year; default now"
},
"altitude_km": {
"type": "number",
"description": "optional, default 0; WMM valid [-1,850]"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"properties": {
"model": {
"type": "string"
},
"query": {
"type": "object"
},
"units": {
"type": "object"
},
"engine": {
"type": "string"
},
"down_Z_nT": {
"type": "number"
},
"east_Y_nT": {
"type": "number"
},
"north_X_nT": {
"type": "number"
},
"model_epoch": {
"type": "number"
},
"valid_range": {
"type": "array"
},
"compass_note": {
"type": "string"
},
"deterministic": {
"type": "boolean"
},
"declination_deg": {
"type": "number"
},
"inclination_deg": {
"type": "number"
},
"secular_variation": {
"type": "object"
},
"total_intensity_nT": {
"type": "number"
},
"horizontal_intensity_nT": {
"type": "number"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-01 05:20Z
- Last indexed by Roundhouse
- 2026-07-30 16:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-12 20:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service almanac.locomot.io and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=almanac.locomot.io' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://almanac.locomot.io/field, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.