blitz-api-py

The typed Python SDK for the Blitz API — B2B data, search, and enrichment.

• Fully typed — Pydantic v2 response models with attribute access and IDE autocomplete, TypedDict request filters, and a shipped py.typed marker so mypy/pyright see the types in your own code.
• Sync & async — BlitzAPI and AsyncBlitzAPI over httpx.
• Resilient — built-in client-side rate limiting, retries with backoff on 429/5xx, and a typed exception hierarchy.
• Forward-compatible — new fields the API adds never break deserialization.
• 1:1 with the API — request filters and response fields are snake_case, matching docs.blitz-api.ai.

Create and manage API keys at app.blitz-api.ai.

Billing. Blitz bills per result. A bare for person in client.search.people(...) loop streams every match up to the server-side limit (people: 50k results), which can be a lot of credits. Bound spend with max_items (a client-side total cap on .collect() / .auto_paging_iter(), never sent on the wire) — details in Pagination.

Contents

• Installation
• Quickstart
• Example: find, enrich, collect
• Authentication
• Endpoints
• Pagination
• Configuration
• Error handling
• Forward compatibility
• Development

Installation

pip install blitz-api-py
# or: poetry add blitz-api-py   /   uv add blitz-api-py

Requires Python 3.10+.

Quickstart

from blitz_api import BlitzAPI
from blitz_api.types import Industry, JobLevel

# api_key defaults to the BLITZ_API_KEY environment variable.
with BlitzAPI() as client:
    # Health-check the key before a batch job.
    info = client.account.key_info()
    print(info.valid, info.remaining_credits, info.max_requests_per_seconds)

    # LinkedIn profile URL -> verified work email.
    email = client.enrichment.email(
        person_linkedin_url="https://www.linkedin.com/in/example-person",
    )
    if email.found:
        print(email.email)

    # Search people with typed, autocompleted filters.
    people = client.search.people(
        company={"industry": {"include": [Industry.SOFTWARE_DEVELOPMENT]}},
        people={"job_level": [JobLevel.VP]},
        max_results=10,
    )
    for person in people.results:
        print(person.full_name, person.headline)

Async

import asyncio
from blitz_api import AsyncBlitzAPI

async def main() -> None:
    async with AsyncBlitzAPI() as client:
        result = await client.enrichment.company(
            company_linkedin_url="https://www.linkedin.com/company/placeholder-co",
        )
        print(result.company.name if result.company else None)

asyncio.run(main())

Example: find, enrich, collect

A complete flow — find people, enrich each one's verified work email, collect the contacts. max_items caps the total fetched so the run can't surprise you with credits.

from blitz_api import BlitzAPI
from blitz_api.types import Industry, JobLevel

client = BlitzAPI()  # reads BLITZ_API_KEY

# 1. Find up to 25 VPs at software companies (typed filters, 1:1 with the API).
leads = client.search.people(
    company={"industry": {"include": [Industry.SOFTWARE_DEVELOPMENT]}},
    people={"job_level": [JobLevel.VP]},
    max_results=25,
).collect(max_items=25)  # client-side total cap — bounds credit spend

# 2. Enrich each lead's verified work email from their LinkedIn profile URL.
contacts: list[dict[str, str | None]] = []
for person in leads:
    if not person.linkedin_url:
        continue
    result = client.enrichment.email(person_linkedin_url=person.linkedin_url)
    if result.found:
        contacts.append({"name": person.full_name, "email": result.email})

print(f"Collected {len(contacts)} contacts")

What comes back is typed and snake_case. A Person from the search above (fields are a superset — only what the profile has is populated, and unknown fields the API adds later are preserved):

Person(
    full_name="Jordan Lee",
    headline="VP of Engineering at Acme",
    linkedin_url="https://www.linkedin.com/in/example-person",
    location=Location(city="San Francisco", state_code="CA", country_code="US", continent="North America"),
    experiences=[Experience(job_title="VP of Engineering", company_name="Acme", job_is_current=True)],
    # first_name, last_name, skills, education, certifications, … also present
)

And enrichment.email(...) returns:

EmailEnrichmentResponse(
    found=True,
    email="jordan@acme.com",
    all_emails=[EmailMatch(email="jordan@acme.com", email_domain="acme.com")],
)

Authentication

Pass the key explicitly or via the BLITZ_API_KEY environment variable:

client = BlitzAPI(api_key="sk_...")          # explicit
client = BlitzAPI()                           # reads BLITZ_API_KEY

The key is sent in the x-api-key header. Never expose it in client-side code — always call the API from your backend.

Endpoints

All methods are grouped into seven namespaces:

Every method returns a typed Pydantic model (see blitz_api.types). Enum-backed filter fields (e.g. Industry, JobLevel, Continent) accept either an enum member or a raw string.

Pagination

The search and jobs methods return an auto-paginating page: iterate it and the SDK fetches each subsequent page for you. search.people/search.companies and jobs.search/jobs.company are cursor-based; search.employee_finder is page-based — all behave identically here.

max_results is the page size, not a total. It's results per page, and the API bills 1 credit per result returned. A bare for person in client.search.people(...) loop streams every match up to the server-side limit (people: 50k results / 1k pages; employee finder: 10k; jobs: 5k), which can be a lot of credits. Bound it with max_items on .collect() / .auto_paging_iter() (a client-side total cap — never sent on the wire), break out of the loop, or drive pages manually.

# Iterate every matching person across all pages — no cursor handling needed.
for person in client.search.people(people={"job_level": ["VP"]}):
    print(person.full_name)

# Async works the same way.
async for person in await async_client.search.people(people={"job_level": ["VP"]}):
    ...

# Bound how much you pull.
for person in client.search.people(...).auto_paging_iter(max_items=200):
    ...

# Per-page control: inspect totals / cursors as you go.
for page in client.search.companies(company={...}).iter_pages(max_pages=5):
    print(page.total_results, len(page.results), page.cursor)

# Jobs are cursor-paginated too — surface hiring signals matching your ICP.
for job in client.jobs.search(
    job={"title": {"include": ["Head of Sales"]}, "date_posted": {"last_days": 30}},
    company={"industry": {"include": ["Software Development"]}, "size": {"include": ["51-200"]}},
).auto_paging_iter(max_items=200):
    print(job.company_name, job.title, job.location.city if job.location else None)

# Or page manually.
page = client.search.people(people={...}, max_results=50)
print(page.results, page.cursor)
nxt = page.get_next_page()        # None once exhausted

The page types (CursorPage, PageNumberPage, and their Async* variants) are exported from blitz_api.

Configuration

client = BlitzAPI(
    api_key=None,                 # falls back to BLITZ_API_KEY
    base_url="https://api.blitz-api.ai",
    timeout=30.0,                 # seconds, or an httpx.Timeout
    max_retries=3,                # retries on 429 / 5xx / network errors
    rate_limit_rps=5.0,           # client-side throttle; None to disable
)

The client-side rate limiter is a sliding window — at most rate_limit_rps requests in any rolling second — applied per endpoint: each endpoint (e.g. .email vs .phone) is throttled independently, mirroring the API's own limit, which is also per endpoint (5 req/s by default; check yours via client.account.key_info().max_requests_per_seconds). A single client instance therefore stays under the limit on every endpoint, so a burst on one never blocks another. Across multiple processes — which share an endpoint's budget — you may still hit 429; the retry path handles that.

Every method also accepts a per-call timeout (seconds or an httpx.Timeout) when one endpoint needs longer than the client default:

client.search.people(people={"job_level": ["VP"]}, timeout=10.0)

Error handling

from blitz_api import (
    BlitzError, AuthenticationError, InsufficientCreditsError,
    NotFoundError, RateLimitError, APIStatusError, APIConnectionError,
    APITimeoutError, APIResponseValidationError,
)

try:
    client.enrichment.email(person_linkedin_url="...")
except InsufficientCreditsError:
    ...                            # 402 — out of credits
except AuthenticationError:
    ...                            # 401 — bad key
except APIStatusError as err:
    print(err.status_code, err.message, err.body)
except APIResponseValidationError:
    ...                            # 2xx whose body wasn't valid / didn't match the model
except BlitzError:
    ...                            # base class for everything this SDK raises

429 and 5xx are retried automatically (with backoff) up to max_retries; 401/402/404 raise immediately. Connect timeouts and connection errors are retried, but a read timeout is not — the server may already have processed (and billed) the request, so it surfaces as APITimeoutError rather than risking a double charge.

Forward compatibility

Response models subclass a base configured with extra="allow", so a field the API adds before this SDK models it is still present on the parsed object (via attribute access or .model_extra). Known fields stay precisely typed.

Development

See CONTRIBUTING.md for local setup, the test/type/lint commands, the enum code generator, and the automated release process.

License

MIT