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 is listed with 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 10 more developer resources.

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18.1/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent Heartbeat 100/100 alive self hosted · BSD-3-Clause Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 API

Async Clients HTTP Client Library Python

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 18.1/100 · emerging

Contract Quality 0.0 / 19

Developer Ergonomics 3.2 / 15

Access Clarity 1.2 / 15

Operational Transparency 2.6 / 10

Contract Governance 0.0 / 9

Discoverability 4.3 / 8

Regulatory Posture 0.9 / 15

Open Source Surface 6.5 / 10

Agent readiness — 1/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 21.4 — up to +15.7 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/httpx/apis.yml: open an issue on github.com/api-evangelist/httpx to ask a question or point us at an artifact you publish. 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 ...

HTTPX API pricing

Not yet checked against HTTPX's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against HTTPX's documentation. All 5 limits →

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 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Releases

Releases

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/httpx.png
x-docs-platform: mkdocs
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: github-pages
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: Plans
  url: plans/httpx-plans-pricing.yml
- type: RateLimits
  url: rate-limits/httpx-rate-limits.yml
- type: FinOps
  url: finops/httpx-finops.yml
- 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

HTTPX API — frequently asked questions

Does HTTPX have an API?

Yes. APIs.io lists 1 API from HTTPX, including HTTPX.

How much does the HTTPX API cost?

APIs.io lists 3 pricing plans for HTTPX, with each plan's price, limits and inclusions under Pricing on this page.

Is the HTTPX API ready for AI agents?

HTTPX has a Kin Score of 18.1 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.

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apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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