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Busker Token Counter
x402
Busker Token Counter is a paid API for AI agents from workbot1.oddsys.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Returns exact BPE token counts for OpenAI-family encodings (o200k_base or cl100k_base) for a single text or batch of up to 100 texts, with optional truncation to a token budget.
Price / call$0.001
Success—
StatusUnknown
How this service works
Exact BPE token counts for OpenAI-family encodings (o200k_base for GPT-4o/4.1/5, cl100k_base for GPT-4/3.5/embeddings), single text or batches, with optional truncation to a token budget. Up to 512 KB per call.
Output
Returns exact integer token count(s) for each input text under the specified BPE encoding, plus truncated text (and its token count) if a truncate budget was supplied and exceeded. For batch requests, results are returned per item.
Example use cases
Prompt fits-in-context check
“Before I send this system prompt to GPT-4o, can you tell me exactly how many o200k_base tokens it uses? Here's the text: 'You are a helpful assistant. Always respond concisely and cite your sources.'”
Batch token audit for fine-tuning dataset
“I have 20 training examples I'm preparing for fine-tuning. Can you count the cl100k_base tokens for each of them so I can filter out any that exceed 4096 tokens?”
Smart truncation for embeddings pipeline
“I need to embed this document but the embeddings model has a 8191 token limit — can you count the cl100k_base tokens and truncate it to 8000 tokens if it's over the limit?”
Technical details
Endpoint
POSThttps://workbot1.oddsys.org/tokens?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need guaranteed-accurate BPE token counts matching OpenAI's actual tokenizer — not an approximation — especially for prompt budget management, context window checks, or preprocessing pipelines before calling OpenAI APIs. Prefer this over heuristic character-count estimates or client-side approximations when exact token accounting matters (e.g., fine-tuning, embeddings, cost estimation).
Side effects
- Input exceeds 512 KB per call — request rejected
- Batch exceeds 100 items — validation error
- Invalid or missing encoding value defaults to o200k_base but may return error if malformed
- Empty text input may return 0 tokens or an error depending on implementation
- Payment failure (x402) blocks the call before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text to count. |
| texts | array | Batch of texts. |
| encoding | string | BPE encoding (default o200k_base). |
| truncate | integer | Token budget — when exceeded the response includes the text cut to this many tokens. |
Tags
x402
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