HTTPX

HTTPX is a fully featured HTTP client for Python 3 with sync and async APIs, HTTP/1.1 and HTTP/2 support. It is broadly compatible with the popular requests library while adding modern features such as strict timeouts, type annotations, direct WSGI and ASGI transport, SSL verification, cookie persistence, proxy support, and multipart uploads.

HTTPX publishes 1 API on the APIs.io network. Tagged areas include Async, Clients, HTTP Client, Library, and Python.

The HTTPX catalog on APIs.io includes 1 Spectral governance ruleset.

HTTPX’s developer surface includes documentation and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

19.1/100 emerging ▬ flat Agent 3/100 human only self hosted · BSD-3-Clause Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

1 APIs

Async Clients HTTP Client Library Python

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 19.1/100 · emerging

Contract Quality 0.0 / 19

Developer Ergonomics 3.2 / 15

Access Clarity 2.4 / 15

Operational Transparency 2.6 / 10

Contract Governance 0.0 / 9

Discoverability 4.4 / 8

Regulatory Posture 1.7 / 15

Open Source Surface 6.5 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Education & Research regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 75 points between them, because both conditional facets apply and carry 25 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/httpx: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

HTTPX

HTTPX is a fully featured HTTP client library for Python 3 with sync and async APIs, HTTP/1.1 and HTTP/2 support. It is consumed as a Python package rather than as a hosted API ...

Pricing Plans 1

Published pricing tiers and plan structures.

Httpx Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Httpx Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Httpx Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

HTTPX API Rules

0 rules ·

SPECTRAL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Httpx Domain Security

TLSv1.3

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Releases

Releases

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: httpx
name: HTTPX
description: HTTPX is a fully featured HTTP client for Python 3 with sync and async APIs, HTTP/1.1 and HTTP/2 support. It
  is broadly compatible with the popular requests library while adding modern features such as strict timeouts, type annotations,
  direct WSGI and ASGI transport, SSL verification, cookie persistence, proxy support, and multipart uploads.
type: Index
deliveryModel:
  model: self-hosted
  license: BSD-3-Clause
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/httpx.png
tags:
- Async
- Clients
- HTTP Client
- Library
- Python
url: https://raw.githubusercontent.com/api-evangelist/httpx/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: httpx:httpx
  name: HTTPX
  description: HTTPX is a fully featured HTTP client library for Python 3 with sync and async APIs, HTTP/1.1 and HTTP/2 support.
    It is consumed as a Python package rather than as a hosted API service.
  humanURL: https://www.python-httpx.org
  tags:
  - Async
  - Clients
  - HTTP Client
  - Library
  - Python
  properties:
  - type: Documentation
    url: https://www.python-httpx.org
  - type: GettingStarted
    url: https://www.python-httpx.org/quickstart/
  - type: Repository
    url: https://github.com/encode/httpx
  - type: Package
    url: https://pypi.org/project/httpx/
  - type: Rules
    url: rules/httpx-rules.yml
common:
- type: Releases
  url: https://github.com/encode/httpx/releases
- type: CodeOfConduct
  url: https://github.com/encode/httpx/blob/master/docs/code_of_conduct.md
- type: ContributionGuide
  url: https://github.com/encode/httpx/blob/master/.github/CONTRIBUTING.md
- type: License
  name: BSD-3-Clause
  url: https://github.com/encode/httpx/blob/master/LICENSE
- type: DomainSecurity
  url: security/httpx-domain-security.yml
- type: Website
  url: https://www.python-httpx.org
- type: Documentation
  url: https://www.python-httpx.org
- type: GitHubOrganization
  url: https://github.com/encode/httpx
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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