# Isyslab — Wrapped API

> **You are on:** `https://api.beta.paywithlocus.com/api` | [llms.txt](https://beta.paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

> Access data from isyslab.info.

**Category:** Healthcare | **Website:** [http://isyslab.info/StraPep/browse_organism.php](http://isyslab.info/StraPep/browse_organism.php) | **Docs:** [parse.bot/marketplace/6c6c173d-5145-4e41-a416-99e0dec9b805/isyslab-info-api](https://parse.bot/marketplace/6c6c173d-5145-4e41-a416-99e0dec9b805/isyslab-info-api)

Pay-per-use API proxy for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.beta.paywithlocus.com/api/wrapped/credits/isyslab/`
**Auth:** `Authorization: Bearer <LOCUS_CREDITS_SECRET_KEY>` (an `lcr_` secret key or a scoped `lcac_` agent credential)
**Required header:** `Idempotency-Key: <fresh UUID per call>`. A retry with the same key replays the stored result without a new charge.
**Response:** the provider response after any endpoint-specific normalization. `X-Locus-Credits-Charged` carries the charge and `X-Locus-Credits-Balance` the remaining balance. Insufficient credits return `402` before the provider is called.
**Pricing:** estimated costs below are USD. Locus debits the credit equivalent at your workspace rate.

Full call contract: https://docs.paywithlocus.com/api-reference/introduction

> Using a Pay With Locus wallet key (`claw_` prefix)? Wallet routes are documented separately: https://docs.paywithlocus.com/wrapped-apis/for-agents

## Endpoints

### Browse by classification

Browse all peptides within a given classification category. Returns all peptides belonging to the specified classification with their basic information. The six classification categories are: Antimicrobial, Toxin and venom peptide, Cytokine/Growth factor, Hormone, Neuropeptide, Other.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `classification` | string | No | Peptide classification category to browse. |

```bash
curl -X POST https://api.beta.paywithlocus.com/api/wrapped/credits/isyslab/browse-by-classification \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"classification":"<string>"}'
```

### Get peptide detail

Retrieve detailed information for a single bioactive peptide by its BPID. Returns comprehensive data including amino acid sequence, Gene Ontology terms, PDB structures, disulfide bond positions, Pfam domains, molecular weight, and isoelectric point. Some fields may be absent if not available for the peptide.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `peptide_id` | string | Yes | StraPep peptide identifier (e.g. BP0005, BP0013). Obtain from search_peptides or browse_by_classification results. |

```bash
curl -X POST https://api.beta.paywithlocus.com/api/wrapped/credits/isyslab/get-peptide-detail \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"peptide_id":"<string>"}'
```

### Search peptides

Search the StraPep bioactive peptide database by field. Returns matching peptides with basic information including BPID, classification, organism, name, length, and amino acid sequence. Supports searching by ID, name, family, UniProt ID, PDB ID, or sequence. Results are returned as a single page containing all matches.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `query` | string | Yes | Search query term (e.g. 'defensin', 'BP0005', 'PF00323') |
| `search_field` | string | No | Field to search by. |

```bash
curl -X POST https://api.beta.paywithlocus.com/api/wrapped/credits/isyslab/search-peptides \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"query":"<string>","search_field":"<string>"}'
```

## Next steps

- [All wrapped API providers](https://beta.paywithlocus.com/wapi/index.md): pick another provider.
- [Find and call tools](https://beta.paywithlocus.com/agent/tools.md): price ceilings, async results, and errors.
- [Credits and billing](https://beta.paywithlocus.com/agent/billing.md): what a call costs and how to add credits.
- [Agent docs index](https://beta.paywithlocus.com/agent/index.md): every Locus agent page.