# Emboss Pay-per-call API

**Canonical:** https://apis.io/apis/getemboss-ai/emboss-pay-per-call-api/  
**Provider:** Emboss — https://apis.io/providers/getemboss-ai/  
**Base URL:** https://api.getemboss.ai/pay  
**Documentation:** https://getemboss.ai/docs/pay-per-call

Emboss Pay-per-call API is one of 4 APIs that [Emboss](https://apis.io/providers/getemboss-ai/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include x402, pay-per-call, PDF, Forms, and Fax. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The anonymous pay door at api.getemboss.ai/pay: make fillable, fill from data, fill with context, read a filled form back, and fax, each priced per job by page count, plus a free stateless quote. No account or key — the first request answers 402 with an x402 challenge (USDC on Base, or gasless via Circle Gateway) and an MPP challenge (Tempo USDC.e or a card via Stripe Shared Payment Tokens); resend the identical request with the payment credential and poll a tokened status URL. Always ephemeral. The OpenAPI carries x-payment-info on every operation and is the entry Emboss publishes in its ARD/AIR catalogue.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| POST | `/pay/make-fillable` | Turn a flat or scanned PDF form into a fillable PDF with detected fields. |
| POST | `/pay/fill-with-context` | Fill a PDF form using facts found in supporting documents. |
| POST | `/pay/fill` | Fill a PDF form from structured data such as JSON or key-value answers. |
| POST | `/pay/read` | Read the values out of a filled PDF form, labelled by field, with a completeness verdict when the form is known. |
| POST | `/pay/fax` | Send a PDF to a fax number and track delivery, priced per transmitted page. |
| POST | `/pay/quote` | Free price check for a PDF |

## Machine-readable artifacts (12)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/openapi/getemboss-ai-pay-per-call-openapi.yml
- **OpenAPI** — https://api.getemboss.ai/openapi.json
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/overlays/getemboss-ai-pay-per-call-overlay.yaml
- **Documentation** — https://getemboss.ai/docs/pay-per-call
- **Documentation** — https://getemboss.ai/docs/pay-per-call/mpp
- **Documentation** — https://getemboss.ai/docs/pay-per-call/x402
- **LLMsTxt** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/llms/getemboss-ai-pay-llms.txt
- **LLMsTxt** — https://api.getemboss.ai/pay/llms.txt
- **Plans** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/plans/getemboss-ai-plans-pricing.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/conventions/getemboss-ai-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/errors/getemboss-ai-problem-types.yml
- **AgentSkill** — https://raw.githubusercontent.com/api-evangelist/getemboss-ai/refs/heads/main/skills/getemboss-ai-pay-per-call-anonymous.md

## Other Emboss APIs (3)

- [Emboss Account API](https://apis.io/apis/getemboss-ai/emboss-account-api/)
- [Emboss MCP Server](https://apis.io/apis/getemboss-ai/emboss-mcp-server/)
- [Emboss A2A Agent](https://apis.io/apis/getemboss-ai/emboss-a2a-agent/)

## Tags

x402, pay-per-call, PDF, Forms, Fax

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/getemboss-ai/emboss-pay-per-call-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/getemboss-ai/.