pictomancer

Python SDK for Pictomancer.ai — a thin httpx wrapper around the REST API at https://api.pictomancer.ai.

Install

pip install .

From PyPI (when published):

pip install pictomancer

Sources

Every operation takes a source: an image URL, a base64 string, or a data: URI. For local files or in-memory bytes use the helpers:

from pictomancer import Client, source_from_bytes, source_from_path

with Client() as client:
    out = client.compress(source_from_path("photo.jpg"), q=80)

    with open("photo.jpg", "rb") as f:
        out = client.compress(source_from_bytes(f.read()), q=80)

Configuration

• api_key — optional Bearer token (Authorization: Bearer …).
• base_url — defaults to https://api.pictomancer.ai.
• timeout — request timeout in seconds (default 30.0).

JSON helpers return dict; image operations return bytes (response body).

Synchronous client

from pictomancer import Client

with Client(api_key="your-api-key") as client:
    info = client.info()
    usage = client.usage()

    meta = client.analyze("https://example.com/image.jpg")

    out = client.resize("https://example.com/image.jpg", scale=0.5, format="webp")
    out = client.compress("https://example.com/image.jpg", q=85, format="jpeg")
    out = client.convert("https://example.com/image.jpg", "png", q=90)
    out = client.crop("https://example.com/image.jpg", 0, 0, 100, 100, format="webp")
    out = client.pipeline(
        "https://example.com/image.jpg",
        [
            {"type": "resize", "params": {"scale": "0.5"}},
            {"type": "convert", "params": {"format": "webp"}},
        ],
    )

    with open("out.webp", "wb") as f:
        f.write(out)

Async client

import asyncio
from pictomancer import AsyncClient


async def main():
    async with AsyncClient(api_key="your-api-key") as client:
        info = await client.info()
        usage = await client.usage()
        meta = await client.analyze("https://example.com/image.jpg")
        out = await client.resize("https://example.com/image.jpg", scale=0.5, format="webp")
        return info, usage, meta, out


asyncio.run(main())

Quality target (SSIM)

Instead of guessing a q value, ask for the smallest file that still scores at least a given SSIM. Pass quality_target (float, 0 < v <= 1) to compress or convert; the server binary-searches the encoder quality for you.

with Client(api_key="your-api-key") as client:
    out = client.compress("https://example.com/image.jpg", format="webp", quality_target=0.95)
    out = client.convert("https://example.com/image.jpg", "avif", quality_target=0.9)

Constraints (validated server-side, violations return 422):

• Mutually exclusive with q, and with lossless=True on convert.
• Only for jpeg, webp and avif outputs; compress requires an explicit format.
• Not supported inside pipeline operations.
• Carries a flat surcharge for the extra encodes.

The search outcome is reported in response headers (the SDK returns the body only; inspect them with your own httpx client or event hooks if you need them):

• X-Pictomancer-Quality-Target - the target you asked for.
• X-Pictomancer-Quality-Achieved - SSIM of the returned encode, e.g. 0.9530.
• X-Pictomancer-Quality-Q-Final - encoder quality the search settled on.
• X-Pictomancer-Quality-Encodes - encode cycles spent.

Headers are absent when no search ran. X-Pig-Billed is 0 when the input came back untouched (already within target at its current size).

Delivery: write the result somewhere else

By default an operation returns the optimized bytes. Pass a delivery target to have Pictomancer write the result directly to your storage or endpoint instead — the operation then returns a dict (etag, sha256, bytes written, ...). No cloud credentials ever reach Pictomancer.

from pictomancer import Client, PutUrl, Callback

with Client(api_key="your-api-key") as client:
    # Upload to a customer-signed presigned PUT URL (S3/R2/GCS/Azure).
    res = client.resize(
        "https://example.com/image.jpg",
        scale=0.5,
        delivery=PutUrl("https://bucket.s3.amazonaws.com/key?X-Amz-Signature=..."),
    )
    print(res["sha256"], res["bytes_written"])

    # Or POST the bytes to your own callback endpoint (async/large jobs).
    res = client.compress(
        "https://example.com/image.jpg",
        delivery=Callback("https://hooks.example.com/pig?token=secret"),
    )
    print(res["status"], res["sha256"])

PutUrl and Callback accept optional headers= (whitelisted storage headers, e.g. Content-Type, Cache-Control, x-amz-*). The returned sha256 is the digest of exactly the bytes delivered, so you can verify the stored object.

Authenticating a callback

Pass secret= to Callback to have the POST body signed. We send X-Pig-Signature: sha256=<hex> (HMAC-SHA256 of the body, GitHub-webhook style). The secret is used per request and never stored. Verify it on your endpoint:

res = client.resize(
    "https://example.com/image.jpg",
    scale=0.5,
    delivery=Callback("https://hooks.example.com/pig", secret="shared-secret"),
)

# On your endpoint (any framework), recompute and constant-time compare:
import hashlib, hmac
expected = "sha256=" + hmac.new(b"shared-secret", request_body, hashlib.sha256).hexdigest()
assert hmac.compare_digest(expected, request.headers["X-Pig-Signature"])

Errors use httpx behavior: non-2xx responses raise httpx.HTTPStatusError after raise_for_status().

API documentation

Interactive docs: https://api.pictomancer.ai/docs

OpenAPI: https://api.pictomancer.ai/openapi.json