agent-services x402 JWT Decode

x402

agent-services x402 JWT Decode is a paid API for AI agents from 49112-hjhjtioxvirqvcvo.splox.app, paid per call via x402, $0.0005/call, status unknown (last checked 2026-10-02).

Decodes a JWT token into its header and payload components, reporting whether a signature is present, paid per-call via x402/USDC.

Price / call$0.0005

Seller volume →—

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StatusUnknown

How this service works

Paid per-call web tools for AI agents: DNS, TLS, robots.txt, hashing, JavaScript rendering and screenshots. Payment over x402 (USDC on Base).

Output

Returns a JSON object containing the decoded JWT header (object with alg, typ, etc.), the decoded payload (object with claims such as sub, exp, iat, roles), a boolean signature_present flag indicating whether the third JWT segment exists, an echo of the requested algo, and the input byte count. On error, returns an error string.

Example use cases

Inspect auth token claims

“I have this JWT from our API response and I need to see what claims and expiration are inside it — can you decode it? Token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoiYWJjMTIzIiwiZXhwIjoxNzAwMDAwMDAwfQ.abc123”

Debug JWT authentication issue

“Our login is failing and I think the JWT might have wrong claims — can you decode this token and show me the full header and payload so I can see what's in it? Token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzQ1NiIsInJvbGUiOiJhZG1pbiIsImlhdCI6MTYwMDAwMDAwMH0.signature”

Check JWT signature presence

“Can you decode this JWT and tell me whether it actually has a signature attached or if it's unsigned? Token: eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJzdWIiOiJ0ZXN0In0.”

Technical details

Endpoint

GEThttps://49112-hjhjtioxvirqvcvo.splox.app/jwt-decode?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to quickly inspect the contents of a JWT — reading claims, checking expiration, or verifying header algorithm — without needing cryptographic signature verification. Ideal for debugging auth flows, logging token metadata, or extracting user claims from a bearer token in an agent pipeline. Prefer this over local decoding when operating in a sandboxed or stateless agent environment without access to a crypto library.

Side effects

Malformed JWT (not three base64url segments) returns an error field
Missing required parameter 'v' (the token) returns a validation error
Missing required parameter 'algo' returns a validation error
algo set to anything other than 'jwt-decode' for this endpoint returns wrong tool output
Payment failure over x402 returns HTTP 402 before processing

Input

Schema · Request body

Field	Type	Description
vrequired	string	value to hash/encode/decode
key	string	HMAC key (hmac-sha256 only)
algorequired	string	sha256\|sha512\|sha1\|md5\|hmac-sha256\|base64enc\|base64dec\|jwt-decode

Output

Schema · Response

Field	Type	Description
algorequired	string	echo of the requested algorithm
error	string
digest	string	hex digest for sha256/sha512/sha1/md5/hmac-sha256
header	object	jwt-decode: decoded header
result	string	base64enc/base64dec output
payload	object	jwt-decode: decoded payload
input_bytes	integer
signature_present	boolean

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