Saylor Innovations Data Desk
Decode a JWT header and claims without verifying it - issuer, subject, audience, issued, not-before and expiry times, lifetime and security warnings
DataLiveeip155:8453Exactvia facilitator:payAI
Decode a jwt tokenJwt expiry time and claimsIs this jwt expiredInspect jwt header algorithmJwt security warnings alg none
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.
$15.76
Verified settled volume
1,657 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aaThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0xA2A8…fc8aa. The signed payment is good for 2 minutes.
- Paid to
- 0xA2A8…fc8aa
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:datadesk:jwt-decoder",
"name": "USD Coin",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}
},
"output": {
"type": "json",
"example": {
"note": "The signature is NOT verified (that needs the issuer's key), so never trust claims from this decode. Tokens placed in a URL can be logged by servers and proxies; use expired or test tokens only.",
"header": {
"alg": "HS256",
"typ": "JWT"
},
"issuer": null,
"key_id": null,
"source": "base64url decoding",
"expired": null,
"payload": {
"iat": 1516239022,
"sub": "1234567890",
"name": "John Doe"
},
"subject": "1234567890",
"audience": null,
"warnings": [
"symmetric HMAC algorithm: the same secret signs and verifies, so keep it server-side",
"no exp claim: the token never expires",
"no iss (issuer) claim",
"no aud (audience) claim"
],
"algorithm": "HS256",
"issued_at": {
"iso": "2018-01-18T01:30:22.000Z",
"unix": 1516239022,
"relative_seconds": -275988057
},
"expires_at": null,
"not_before": null,
"token_type": "JWT",
"custom_claims": [
"name"
],
"signature_bytes": 32,
"lifetime_seconds": null,
"signature_present": true,
"signature_verified": false
}
}
},
"schema": {
"type": "object",
"$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",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"token"
],
"properties": {
"token": {
"type": "string",
"description": "JWT string (header.payload.signature); use expired or test tokens only"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"header",
"payload",
"warnings"
],
"properties": {
"note": {
"type": "string",
"description": "Caveat or context for reading the result"
},
"header": {
"type": "object",
"properties": {
"alg": {
"type": [
"string",
"null"
],
"description": "Signing algorithm"
},
"typ": {
"type": [
"string",
"null"
],
"description": "Token type"
}
},
"description": "Decoded JWT header"
},
"issuer": {
"description": "iss claim, or null"
},
"key_id": {
"description": "Key id identifier"
},
"source": {
"type": "string",
"description": "Data source the values come from"
},
"expired": {
"type": [
"boolean",
"null"
],
"description": "True when exp is in the past, null when there is no exp claim"
},
"payload": {
"type": "object",
"properties": {
"iat": {
"type": [
"number",
"null"
],
"description": "Issued-at claim as a Unix time"
},
"sub": {
"type": [
"string",
"null"
],
"description": "Subject claim"
},
"name": {
"type": [
"string",
"null"
],
"description": "Name"
}
},
"description": "Decoded JWT claims"
},
"subject": {
"type": [
"string",
"null"
],
"description": "What this response is for"
},
"audience": {
"description": "aud claim, or null"
},
"warnings": {
"type": "array",
"description": "Security problems found, such as alg none or a shared-secret algorithm"
},
"algorithm": {
"type": [
"string",
"null"
],
"description": "Signing algorithm from the header"
},
"issued_at": {
"type": [
"object",
"null"
],
"properties": {
"iso": {
"type": [
"string",
"null"
],
"description": "Issued-at as an ISO timestamp"
},
"unix": {
"type": [
"number",
"null"
],
"description": "Issued-at as Unix seconds"
},
"relative_seconds": {
"type": [
"number",
"null"
],
"description": "Relative, in seconds"
}
},
"description": "Issued at (UTC unless a time zone is given)"
},
"expires_at": {
"type": [
"object",
"null"
],
"description": "Expires at"
},
"not_before": {
"description": "Not before"
},
"token_type": {
"type": [
"string",
"null"
],
"description": "Token type"
},
"custom_claims": {
"type": "array",
"description": "Custom claims"
},
"signature_bytes": {
"type": [
"number",
"null"
],
"description": "Signature, in bytes"
},
"lifetime_seconds": {
"description": "Lifetime, in seconds"
},
"signature_present": {
"type": [
"boolean",
"null"
],
"description": "Signature present"
},
"signature_verified": {
"type": "boolean",
"description": "Signature verified"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-18 08:31Z
- Last indexed by Roundhouse
- 2026-10-26 21:16Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 10:45Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 404
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Saylor Innovations Data Desk 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=Saylor%20Innovations%20Data%20Desk' 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://saylorinnovations.com/api/dev/jwt-decode, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.