REST · gRPC · STREAMING · v1.4.0

The intelligence layer
for peptide research.

One API for structured peptide data, AI-summarized research, protocols, vendor intelligence, and semantic discovery. Built for developers, grounded in the literature.

Get API key Try in playgroundRead the docs
  • 99.99% uptime
  • JSON · SDKs
  • AI-grounded
  • Research-grade
BPC-157GHK-CuTB-500CJC-1295IpamorelinSemaglutideMOTS-cEpitalonTesamorelinSemaxSelankSS-31NAD+TirzepatideRetatrutideBPC-157GHK-CuTB-500CJC-1295IpamorelinSemaglutideMOTS-cEpitalonTesamorelinSemaxSelankSS-31NAD+TirzepatideRetatrutide
API PLAYGROUND

Try the API. Right here.

Switch language, pick a peptide, hit Run. Real response, real latency, real schema.

api.peptides.dev/v1/peptides/bpc-157
env: live
curl --request GET \
  --url https://api.peptides.dev/v1/peptides/bpc-157 \
  --header 'Authorization: Bearer $PX_KEY' \
  --header 'Accept: application/json'
pk_live_●●●●●●●●●●●●
Response
86ms200 OKcached
▍
WHY DEVS PICK PEPTIDES.API

Twelve capabilities. One coherent API.

Every feature is a first-class endpoint with consistent auth, pagination and observability.

Capability · 01 / 12

Peptide Database

10K+ peptides with curated sequences, MW, half-life, mechanisms, and receptor targets.

10,247peptides
GEPPPGKPADDAGLV
BPC-157 · 15 amino acids · MW 1419.5 · half-life 4h
10,247 peptides · sequences · receptors · half-lives · mechanisms
01/12
DATA COVERAGE

The largest structured peptide corpus.

Continuously enriched from PubMed, preprint servers, vendor disclosures and protocol archives.

↑ live
0
Peptides indexed
+412 this quarter
↑ live
0
Research papers
auto-ingested daily
↑ live
0
Protocols
across 184 goals
↑ live
0K
Semantic vectors
1.2M · 1536-d
↑ live
0
Vendors tracked
98 verified labs
↑ live
0.0 yrs
Of research
indexed corpus
REST API REFERENCE

32 endpoints. Built for production.

Beautiful, consistent, and predictable. Cursor pagination, idempotency keys, signed webhooks.

Peptides7 endpoints
GET/v1/peptides/{id}
stable

Retrieve a peptide by id, alias, or CAS number.

Query parameters
idstringSlug, alias, or CAS
includecsvstudies, protocols, receptors
Example response
{
  "id": "bpc-157",
  "name": "BPC-157",
  "sequence": "GEPPPGKPADDAGLV",
  "molecular_weight": 1419.53,
  "half_life": "~4 h",
  "category": "Healing / Cytoprotective",
  "references": 312
}
VENDOR & COA INTELLIGENCE

Trust, scored and structured.

500+ peptide vendors tracked across COAs, lot purity, lab independence and regulatory flags.

Aggregate trust index
92.4/100
VERIFIED
98
WATCHLIST
32
DELISTED
7
COAS SCANNED
11,482
Bay Area BiolabsUSA · 412 lots
verified
Avg purity99.4%
Trust score98
Helix Research SupplyEU · 287 lots
verified
Avg purity98.7%
Trust score94
Pacific Peptide Co.USA · 521 lots
verified
Avg purity99.1%
Trust score96
Northern SyntheticsCA · 188 lots
watchlist
Avg purity97.3%
Trust score88
Sapphire BiolabsUK · 245 lots
verified
Avg purity99.0%
Trust score92
Eos CompoundingAU · 132 lots
watchlist
Avg purity96.8%
Trust score81
OFFICIAL SDKS

Five languages. Same shape. Zero footguns.

Typed clients, retries, idempotency keys, automatic pagination. Open source on GitHub.

$pip install peptides-api
from peptides import Peptides

px = Peptides(api_key="pk_live_...")
bpc = px.peptides.get("bpc-157")
print(bpc.sequence, bpc.molecular_weight)

similar = px.search.similar(
  peptide="bpc-157", limit=5
)
for s in similar:
  print(s.id, s.score)
Auto-retry w/ exp. backoff
Idempotency keys
Auto-pagination
Fully typed
PRICING

Free to start. Pay as you scale.

No seat-based pricing, no enterprise sales calls for sandboxes. Cancel anytime.

Free
$0forever

For exploration, prototyping and one-off scripts.

  • 1,000 requests / month
  • Core peptide & research endpoints
  • Community support
  • Rate limit: 10 req/min
Start free
RECOMMENDED
Builder
$49per month

For solo devs and small teams shipping in production.

  • 50K requests / month
  • All endpoints incl. AI & semantic search
  • Vector search (1M+ vectors)
  • Email support
  • Webhook events
  • Rate limit: 200 req/min
Get Builder
Research
$249per month

For research teams, biotech labs, and serious products.

  • 500K requests / month
  • Full corpus export access
  • Priority AI throughput
  • Dedicated Slack channel
  • Custom embeddings model
  • SOC 2 reports on request
Talk to research
Enterprise
Customannual

Volume, SLA, and bespoke integrations.

  • Unlimited requests
  • Self-hosted option
  • Custom data partners
  • SSO + audit logs
  • 99.99% SLA
  • Dedicated account team
Contact sales
Academic & open-source projects: apply for free Research access