# Isyslab — Wrapped API

> **You are on:** `https://api.paywithlocus.com/api` | [llms.txt](https://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. Each call is automatically billed to your wallet in USDC.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/parse-isyslab-info-api-6c6c173d/`
**Auth:** `Authorization: Bearer <LOCUS_API_KEY>`

## 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.paywithlocus.com/api/wrapped/parse-isyslab-info-api-6c6c173d/browse_by_classification \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -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.paywithlocus.com/api/wrapped/parse-isyslab-info-api-6c6c173d/get_peptide_detail \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -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.paywithlocus.com/api/wrapped/parse-isyslab-info-api-6c6c173d/search_peptides \
  -H "Authorization: Bearer YOUR_LOCUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query":"<string>","search_field":"<string>"}'
```