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AgentShelf Base64URL Encoder
x402
AgentShelf Base64URL Encoder is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Encodes a text string using base64url encoding, with no network calls or LLM involvement.
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs text encoded with base64url. No network and no LLM. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/base64url-encode first.
Output
Returns a base64url-encoded representation of the input text string, using the URL-safe alphabet (replacing + with - and / with _) and typically without padding characters, suitable for use in URLs, JWT components, or other contexts requiring URL-safe encoding.
Example use cases
JWT component encoding for auth flow
“I need to base64url-encode this JSON string for my JWT header: '{"alg":"HS256","typ":"JWT"}' — can you do that?”
URL-safe encoding of API credentials
“Take this API key 'sk-abc+123/xyz==' and base64url-encode it so I can embed it in a query parameter without breaking the URL.”
Encoding webhook payload for link
“I want to embed this user config '{"userId":42,"role":"admin"}' as a base64url string in a confirmation link — please encode it.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/base64url-encode?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need deterministic, server-side base64url encoding without relying on an LLM or local code execution. Use it when your agent runtime lacks built-in encoding utilities, when you need guaranteed RFC 4648 URL-safe base64 output, or when you want an auditable, paid API call for compliance reasons. Always try the free sandbox endpoint POST /v1/sandbox/base64url-encode first if available.
Side effects
- Empty or missing 'text' field returns a validation error
- Input exceeding 100,000 characters is rejected
- Malformed request body returns a 400-level error
- Payment failure (insufficient USDC balance) results in a 402 response and no encoding is performed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token. |
Tags
x402
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