# Biological Accession/Version Check

> Biological Accession/Version Check is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.024003/call, status unknown (last checked 2026-10-23).

Validates biological accession numbers, isoform declarations, and version strings against a caller-supplied hashed snapshot, reporting missing or ambiguous matches without querying any authoritative external database.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/biology/accession-version-check?utm_source=zero.xyz
- Price: $0.024003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/biological-accession-version-check-589476a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hU9E_UP4yu36BG0n_FHVe

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability biological-accession-version-check-589476a8 -d '<json body>'
```

Example prompt: I have a batch of up to 30 biological accession records with version strings from our public dataset — can you check them against snapshot version 'snap-2024-06-01' using the requested accession 'NM_001301717.2' and flag any missing or ambiguous matches?

## When to prefer this

Choose this endpoint when you need to validate biological accession numbers, isoform declarations, or version strings against a caller-supplied hashed snapshot without triggering any live database lookups. It is ideal for offline or air-gapped data quality workflows, synthetic dataset validation, and pipeline pre-checks where authoritative external queries are not permitted or desired. Prefer it over live NCBI or UniProt lookups when you control the reference snapshot and want deterministic, auditable match reporting.

## Known failure modes

- Snapshot version string not found or malformed — returns error indicating unresolvable snapshot reference
- Records array exceeds 64-item limit — request rejected with validation error
- Accession or version string exceeds 80-character limit — field-level validation failure
- Ambiguous matches reported when multiple records fit the same accession pattern — flagged but not resolved
- Empty or missing required fields cause schema validation errors
- Data class enum value not 'public' or 'synthetic' — rejected with enum mismatch error

## How this service works

Match accession, isoform and version declarations against a caller-supplied hashed snapshot. Report missing or ambiguous matches; no authoritative database lookup. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.

## Output

Returns a report of match outcomes for each submitted accession/isoform/version record: confirmed matches, missing entries, and ambiguous matches against the caller-supplied hashed snapshot. Includes minimal receipt metadata retained for 90 days and full results retained for 24 hours. No authoritative database lookup is performed; results reflect only the provided snapshot.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "records": {
   "type": "array",
   "maxItems": 64,
   "minItems": 1
  },
  "dataClass": {
   "enum": [
    "public",
    "synthetic"
   ],
   "type": "string"
  },
  "snapshotVersion": {
   "type": "string",
   "maxLength": 80,
   "minLength": 1
  },
  "requestedVersion": {
   "type": "string",
   "maxLength": 80,
   "minLength": 1
  },
  "requestedAccession": {
   "type": "string",
   "maxLength": 80,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/biological-accession-version-check-589476a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.mahastrategies.com](https://www.zero.xyz/host/www.mahastrategies.com/llms.txt)