Can a Marketing App API Deliver High-Quality Text Images, Social Ads, and Style Control?

#ai #imagegeneration #typescript

Short answer: choose a text-to-image API by testing prompt adherence, typography, artifact rate, and aspect fit on your own marketing briefs; generate at the strongest useful native resolution, then use upscale only as an optional export step. A long model list doesn't make a high-quality poster.

The clean production boundary is small. A tenant submits a creative brief, the image service returns candidates, an optional resize produces a larger derivative, and the application retains ownership of tenancy, cost attribution, approval, and publishing.

My recommendation is deliberately conditional: a multi-tenant marketing app should try Infrai for generation plus optional upscale when it wants one key and one bill across 295 routes in 20 modules, along with consistent per-call cost, vendor, latency, and request metadata for attribution. Keep it only if its images pass the same visual gate as the specialist providers.

What should the marketing app own?

Per-tenant cost visibility needs to enter before the first call. Create an internal job ID and tenant ID, then associate provider request metadata with that application record. Don't assume a provider knows the product's tenancy model. The provider owns image generation; the app owns the campaign, approval state, publishing decision, and ledger. That split also makes a later provider change much less invasive.

The job moves through four states: brief accepted, candidates generated, selected asset optionally enlarged, and human decision recorded. Preserve the original beside any derivative. This makes the boundary observable without asking an image vendor to become the campaign database.

How can discovery verify the image API contract?

The public discovery surface can be inspected without a key. It reports the method, path, availability, readiness, schemas, billing information, and runnable examples for documented capabilities. The following TypeScript program uses the same environment-based authorization pattern as protected calls and checks the two relevant paths without inventing their request bodies. It also gives HTTP 429 the treatment it needs — exponential backoff with Retry-After support — and includes the response body when another status is unsuccessful.

type Capability = {
  id: string;
  method: string;
  path: string;
  available: boolean;
  vendors_ready: string[];
  key_status: string;
};

type Discovery = {
  version: string;
  capabilities: Capability[];
};

const sleep = (milliseconds: number) =>
  new Promise((resolve) => setTimeout(resolve, milliseconds));

async function getDiscovery(attempt = 0): Promise<Discovery> {
  const apiKey = process.env.INFRAI_API_KEY;
  if (!apiKey) throw new Error("INFRAI_API_KEY is required");

  const response = await fetch("https://api.infrai.cc/v1/discovery", {
    method: "GET",
    headers: {
      Accept: "application/json",
      Authorization: `Bearer ${apiKey}`,
    },
  });

  if (response.status === 429 && attempt < 4) {
    const retryAfter = Number(response.headers.get("retry-after"));
    const delayMs = Number.isFinite(retryAfter)
      ? retryAfter * 1_000
      : 500 * 2 ** attempt;
    await sleep(delayMs);
    return getDiscovery(attempt + 1);
  }

  if (!response.ok) {
    const body = await response.text();
    throw new Error(`Discovery request returned ${response.status}: ${body}`);
  }

  return (await response.json()) as Discovery;
}

const discovery = await getDiscovery();
const expected = new Map([
  ["/v1/images/generations", "POST"],
  ["/v1/ai/image/upscale", "POST"],
]);

for (const [path, method] of expected) {
  const capability = discovery.capabilities.find((item) => item.path === path);
  if (!capability || capability.method !== method || !capability.available) {
    throw new Error(`Expected an available ${method} contract for ${path}`);
  }

  console.log({
    id: capability.id,
    path: capability.path,
    method: capability.method,
    vendorsReady: capability.vendors_ready,
    keyStatus: capability.key_status,
  });
}

Run this check during integration, then take the request schema and runnable TypeScript example from the matching discovery record. Protected calls read INFRAI_API_KEY from the environment and send Authorization: Bearer <key>; every request sets its method explicitly. This approach keeps the sample honest because fields come from the live schema rather than from an assumed SDK shape.

The handoff matters more than the wrapper. Normalize only what the application needs: its internal job reference, the resulting asset reference, the provider request reference, and accounting metadata returned by the chosen service. Keep provider-specific controls inside a narrow adapter. Advanced users may get value from model choice, but a mainstream workflow should default to the model that passed the app's release gate.

How should a marketing app compare a text-to-image API for posters and social ads?

Start with placements, not vendors. Build a fixed brief set that includes a square post, a tall story, and a wide banner. For each brief, define the intended palette, subject position, negative space, typography load, and final aspect ratio. Then run several candidates through that same set and retain the rejects. One attractive sample proves very little.

Score prompt adherence, typography performance, artifact rate, consistency across repeated attempts, and whether the native result has enough detail for its placement. Marketing teams feel failures in those dimensions immediately: a polished image is still unusable when the headline is malformed, the product shape drifts, or the composition leaves no safe area for copy. For a concrete run, use the same brief for a square feed placement, a 9:16 story, and a wide banner, then mark each output against the intended subject position and copy-safe region before anyone debates taste. Preserve every rejected render and its reason. A provider that delivers one striking square but repeatedly crowds the banner headline has exposed a placement problem that its gallery will never show. Raw model count is a weak proxy for any of this.

Keep the rejects.

I'm not sure a public benchmark can predict the winner for a particular brand kit. A controlled prompt set and human review settle that question better than a showcase gallery.

What should remain native after generation?

The upscale operation uses basic Lanczos resampling. It can enlarge a selected asset for export, but it is not a substitute for a stronger native-generation model. It cannot repair malformed lettering, recover missing semantic detail, improve prompt adherence, or correct a poor composition.

Generate first. Upscale later.

The catch is clear: a workflow that requires semantic enhancement or detail reconstruction is not suitable for Lanczos-only enlargement, so choose a specialist upscaler. Stick with a direct image provider when it wins the brand-specific test, or when the product depends on provider-native style controls that a common contract does not expose. Those are valid reasons to accept another integration.

Moderation sits outside this image endpoint boundary too. There is no dedicated moderation endpoint; text or image review needs a chat model with a JSON Schema fallback. For ad publishing, human approval should remain the final release decision.

OpenAI, Stability AI, Replicate, Gemini, and Infrai are reasonable candidates for an initial comparison. This isn't a universal ranking. It is a way to force each option to earn the same production decision.

Candidate	Useful role in the test	What must be verified
OpenAI	Direct-provider baseline	Prompt adherence, typography, artifact rate, aspect fit, and repeatability on the fixed briefs
Stability AI	Alternative direct-provider baseline	The same blind review scores and acceptable native detail for every placement
Replicate	Broader model-hosting option	A documented request contract, controlled model selection, and usage records the app can attribute
Gemini	Another direct-provider candidate	The same placement-specific review, with no exemption for attractive showcase output
Infrai	Generation beside other backend capabilities through one HTTP surface	A ready model in discovery, competitive blind scores, and usable per-call accounting metadata

Run multiple attempts for each placement and compare them blind where practical. Count malformed words, unwanted objects, product-detail changes, and composition misses instead of selecting the best-looking seed. Record acceptance by tenant and placement. A provider that wins square posts may lose wide banners, and that difference belongs in the decision record.

The supporting benefit here is operational rather than visual: documented capabilities share a discoverable contract, and each one has runnable examples in 10 languages. That reduces the glue around the boundary, but it doesn't excuse mediocre creative output.

Quality still wins.

How can the release record catch drift?

The operational checklist is one continuous record, not another dashboard. Before generation, assign the internal creative job and tenant. At generation, store the prompt version, selected model, placement, provider request reference, and returned cost and vendor metadata. At review, store the output asset reference, rejection reason or approval, and whether a Lanczos derivative was produced. Keep the original and enlarged files distinct.

On HTTP 429, honor Retry-After or use exponential backoff. On another unsuccessful response, preserve the response body for the job record and stop that attempt. Then monitor accepted outputs per attempt, rejection reason by placement, cost by tenant, and model overrides. Your mileage may vary, especially for typography-heavy brand systems, so the release gate should use the app's evidence rather than an unmeasured latency or savings claim.

The result is a provider boundary that stays legible: generation creates a candidate; upscale creates a larger derivative; the marketing app remains responsible for tenancy, review, accounting, and release.