Bolna

Bolna is a voice AI platform for building, testing, deploying, and scaling conversational voice agents that place and receive phone calls with human-like, multilingual intelligence. The platform pairs a no-code Agent Studio with a Bearer-authenticated REST API (api.bolna.ai) covering agents, outbound and inbound calls, CSV batch campaigns, executions and transcripts, phone-number purchasing and search, SIP trunks, knowledge bases (RAG over PDFs/URLs), dispositions/extractions, providers (ASR/LLM/TTS credentials), voices, violations, and multi-tenant sub-accounts. Bolna integrates 20+ ASR, LLM, and TTS models (OpenAI, Azure, Anthropic, ElevenLabs, Deepgram) and telephony providers (Twilio, Plivo, SIP), and ships a hosted MCP server, an official Agent Skills collection, a Go CLI, and an open-source Python agent framework. Backed by Y Combinator and General Catalyst; strong focus on Indian-language (Hinglish, Hindi, Tamil, Telugu) voice agents with India data residency.

Bolna is listed with 1 API on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Voice AI, Conversational AI, and Voice Agents.

The Bolna catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Bolna’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, pricing, signup flow, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

57.4/100 strong ▬ flat Agent 54/100 agent ready Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API 1 MCP Servers

Company Artificial Intelligence Voice AI Conversational AI Voice Agents Telephony Speech Call Automation Contact Center MCP

Kin Score

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

Composite quality — 57.4/100 · strong

Contract Quality 8.3 / 21

Developer Ergonomics 11.7 / 17

Access Clarity 13.2 / 17

Operational Transparency 8.1 / 11

Contract Governance 0.5 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 54/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 AI & Biometrics 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.

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 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's

3 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Contract Governance scores 4.5 — up to +11.5 composite points
Developer Ergonomics scores 69.0 — up to +6.2 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/bolna/apis.yml: open an issue on github.com/api-evangelist/bolna 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	long-tail	12.1 (thin)	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

Agent Skills

measured — observed by APIs.io (published)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

Bolna Voice AI API

REST API for building and operating conversational voice AI agents — create and manage agents, place outbound calls, run CSV batch campaigns, wire inbound numbers and SIP trunks...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Bolna MCP Server

Official remote MCP server (Streamable HTTP) wrapping the Bolna voice AI REST API. Manage voice agents, phone numbers, batches, and outbound calls from any MCP client. Authentic...

MCP SERVER

Bolna API pricing

Prices published by Bolna, read 2026-10-07 from www.bolna.ai/pricing.

Plan	Price
Pay-as-you-go	Purchase credits ($10 to $5000) Includes: $5 in free credits when you sign up
Standard rate (volume-based)	6.00¢ (₹5.52) per minute Includes: Standard rate — increase volume for better pricing; best tier 4.51 ¢ / min
Pilots Plan	$500 for 12,000 minutes (~4.2¢/min) Includes: up to 25 concurrent calls, enterprise features, one month of dedicated support
Pilots Plan (smaller tier)	$300 for 6,500 minutes (~4.6¢/min) Includes: up to 25 concurrent calls, enterprise features, one month of dedicated support
Enterprise Plan	Talk to sales Includes: Best-in-class pricing at committed volumes, customised integrations and deployment, priority support

Plan details, limits and sources →

Billed by: credits · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Bolna Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Bolna Rate Limits

4 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Bolna

SLA

FinOps 1

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

Bolna Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Bolna Webhooks

ASYNCAPI

Security Posture 2

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

Bolna Authentication

http · 1 scheme

SECURITY

Bolna Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

WellKnown

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Components

Conventions

ErrorCatalog

Lifecycle

Webhooks

Conformance

DataModel

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 5

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

RateLimits

Deprecation

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Source (apis.yml)

aid: bolna
name: Bolna
description: Bolna is a voice AI platform for building, testing, deploying, and scaling conversational voice agents that place
  and receive phone calls with human-like, multilingual intelligence. The platform pairs a no-code Agent Studio with a Bearer-authenticated
  REST API (api.bolna.ai) covering agents, outbound and inbound calls, CSV batch campaigns, executions and transcripts, phone-number
  purchasing and search, SIP trunks, knowledge bases (RAG over PDFs/URLs), dispositions/extractions, providers (ASR/LLM/TTS
  credentials), voices, violations, and multi-tenant sub-accounts. Bolna integrates 20+ ASR, LLM, and TTS models (OpenAI,
  Azure, Anthropic, ElevenLabs, Deepgram) and telephony providers (Twilio, Plivo, SIP), and ships a hosted MCP server, an
  official Agent Skills collection, a Go CLI, and an open-source Python agent framework. Backed by Y Combinator and General
  Catalyst; strong focus on Indian-language (Hinglish, Hindi, Tamil, Telugu) voice agents with India data residency.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.bolna.ai/logo.png
url: https://raw.githubusercontent.com/api-evangelist/bolna/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- general-catalyst
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Artificial Intelligence
- Voice AI
- Conversational AI
- Voice Agents
- Telephony
- Speech
- Call Automation
- Contact Center
- MCP
tags_raw:
- Company
- Ai
- Voice AI
- Conversational AI
- Voice Agents
- Telephony
- Speech
- Call Automation
- Contact Center
- MCP
apis:
- name: Bolna Voice AI API
  description: REST API for building and operating conversational voice AI agents — create and manage agents, place outbound
    calls, run CSV batch campaigns, wire inbound numbers and SIP trunks, purchase/search phone numbers, retrieve call executions
    and raw logs, manage knowledge bases, dispositions, providers, voices, violations, and sub-accounts. Bearer API-key auth
    over HTTPS.
  humanURL: https://www.bolna.ai/docs/api-reference/introduction
  baseURL: https://api.bolna.ai
  tags:
  - Voice AI
  - Telephony
  - Agents
  properties:
  - type: APIReference
    url: https://www.bolna.ai/docs/api-reference/introduction
  - type: Authentication
    url: authentication/bolna-authentication.yml
  - type: Conventions
    url: conventions/bolna-conventions.yml
  - type: ErrorCatalog
    url: errors/bolna-error-codes.yml
  - type: RateLimits
    url: rate-limits/bolna-rate-limits.yml
  - type: Webhooks
    url: asyncapi/bolna-webhooks.yml
  - type: DataModel
    url: data-model/bolna-data-model.yml
  - type: Lifecycle
    url: lifecycle/bolna-lifecycle.yml
  - type: Conformance
    url: conformance/bolna-conformance.yml
common:
- type: Plans
  url: plans/bolna-plans-pricing.yml
- url: https://www.bolna.ai/blog
  type: Blog
- url: https://www.bolna.ai/blog/rss.xml
  type: BlogRSS
- type: Website
  url: https://www.bolna.ai/
- type: DeveloperPortal
  url: https://platform.bolna.ai/
- type: Documentation
  url: https://www.bolna.ai/docs
- type: APIReference
  url: https://www.bolna.ai/docs/api-reference/introduction
- type: GettingStarted
  url: https://www.bolna.ai/docs/getting-started/agent-creation
- type: Support
  url: mailto:support@bolna.ai
- type: Blog
  url: https://blog.bolna.ai
- type: GitHubOrganization
  url: https://github.com/bolna-ai
- type: Pricing
  url: https://www.bolna.ai/pricing
- type: SignUp
  url: https://platform.bolna.ai/
- type: Login
  url: https://platform.bolna.ai/login
- type: TermsOfService
  url: https://www.bolna.ai/terms-of-service
- type: PrivacyPolicy
  url: https://www.bolna.ai/privacy-policy
- type: StatusPage
  url: https://status.bolna.ai
- type: ChangeLog
  url: https://www.bolna.ai/docs/changelog
- type: MCPServer
  url: mcp/bolna-mcp.yml
- type: LLMsTxt
  url: llms/bolna-llms.txt
- type: Packages
  url: packages/bolna-packages.yml
- type: SDKs
  url: packages/bolna-packages.yml
- type: CLI
  url: cli/bolna-cli.yml
- type: Components
  url: components/bolna-components.yml
- type: Authentication
  url: authentication/bolna-authentication.yml
- type: Conventions
  url: conventions/bolna-conventions.yml
- type: ErrorCatalog
  url: errors/bolna-error-codes.yml
- type: RateLimits
  url: rate-limits/bolna-rate-limits.yml
- type: Lifecycle
  url: lifecycle/bolna-lifecycle.yml
- type: Deprecation
  url: lifecycle/bolna-lifecycle.yml
- type: Webhooks
  url: asyncapi/bolna-webhooks.yml
- type: Conformance
  url: conformance/bolna-conformance.yml
- type: DataModel
  url: data-model/bolna-data-model.yml
- type: WellKnown
  url: well-known/bolna-well-known.yml
- type: DomainSecurity
  url: security/bolna-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Bolna API — frequently asked questions

Does Bolna have an API?

Yes. APIs.io lists 1 API from Bolna, including Bolna Voice AI API.

How do I authenticate with the Bolna API?

Bolna documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Bolna Authentication.

How much does the Bolna API cost?

Bolna publishes its prices; its Pay-as-you-go plan is Purchase credits ($10 to $5000) as of 2026-10-07. APIs.io lists 5 pricing plans for Bolna, with each plan's price, limits and inclusions under Pricing on this page.

Does Bolna have an MCP server?

Yes. APIs.io lists 1 MCP server for Bolna: Official remote MCP server (Streamable HTTP) wrapping the Bolna voice AI REST API. Manage voice agents, phone numbers, batches, and outbound calls from any MCP client. Authenticate with a Bolna API ke

Is the Bolna API ready for AI agents?

Bolna has a Kin Score of 57.4 out of 100 (strong) and an Agent Readiness score of 53.6 (agent-ready), scored by API Evangelist on 2026-11-06.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
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