💰 Paid API

readability.openverbs.com

readability.openverbs.com · readability.openverbs.com

Estimate reading and speaking time for a text at configurable words-per-minute rates (defaults: 200 wpm reading, 130 wpm speaking).

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Verify the domain readability.openverbs.com via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.

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Trust score

34/100

grade F · 9 criteria

Uptime

not measured

no direct probes in 30d

Observed inflow · 30d

Dispute or improve this rating

F

Conformance score: 34/100

F-grade: card is reachable but fails most operational signals.

click to expand breakdown ▾ click to collapse breakdown ▴

pass Valid AgentCard 10/10

Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).

partial Live JSON-RPC 15/25

Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.

            How to earn +10 points
          

Respond live on JSON-RPC

Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.

Docs →

fail Protocol version 0/10

No protocolVersion in card.

            How to earn +10 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.

Docs →

info JWS signature 0/10

Card is unsigned (most published agents are).

info Uptime track record 0/15

Only 0 probes so far, need ≥5 for an uptime grade.

fail Skill declaration 0/10

No skills declared in card. Hard to route to.

            How to earn +10 points
          

Declare your skills

Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.

Docs →

partial Verified Identity 5/10

Provider declared: readability.openverbs.com (https://readability.openverbs.com). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.

            How to earn +5 points
          

Verify your domain ownership

Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.

Docs →

pass Freshness + modern flags 4/5

seen in upstream source within 0d

info Security declaration 0/5

Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Uptime

not measured

0 direct probes · 30d

Response

—

no direct probe retained

Skills

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base USDC Facilitator feed Dispute or improve this rating

From $0.0020 per call

Endpoint	Price	Currency
`https://readability.openverbs.com/v1/grade`	0.002	USDC
`https://readability.openverbs.com/v1/reading-time`	0.002	USDC
`https://readability.openverbs.com/v1/score`	0.002	USDC
`https://readability.openverbs.com/v1/syllables`	0.002	USDC

Try it ↗ Opens the operator's playground / docs in a new tab.

Settlement wallet: 0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $0.89
                

294 calls

Last 30d

                  $0.89
                

294 calls

USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.

Daily 30-day observed-inflow history ~ flat (+0.0%)

2026-09-05 2026-09-07

Peak day: $0.89 Data points: 3 Total tx (30d window): 294

Payment authenticity evidence confidence How we measure this →

single_payer_observed 2/5

Payer identities observed; a single payer accounts for effectively all observed volume.

Assessed window

30d

1 active of 7 observed

Inflow assessed

$0.89

294 transactions

Payer identities

available

3 evidence caveats

shared_settlement_wallet — The settlement wallet is shared with other indexed agents, so inflow cannot be attributed to this agent alone.

Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-09-08.

This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.

Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid get_agent_full and payment_intelligence skills on REST, A2A and MCP. API docs →

Agent card	`https://readability.openverbs.com`
Provider	https://readability.openverbs.com
Docs	https://readability.openverbs.com

Discovered via

agentic_market cdp_discovery

Health · last 0 probes

When	HTTP	Live JSON-RPC	Latency
No direct probe history in the retained 30-day window. Upstream catalogue observations do not count as uptime probes.

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Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/readability.openverbs.com.svg)](https://agenstry.com/agents/readability.openverbs.com)
[![Verified Business](https://agenstry.com/badge/readability.openverbs.com/identity.svg)](https://agenstry.com/agents/readability.openverbs.com)
[![Uptime](https://agenstry.com/badge/readability.openverbs.com/uptime.svg)](https://agenstry.com/agents/readability.openverbs.com)
[![A2A version](https://agenstry.com/badge/readability.openverbs.com/protocol.svg)](https://agenstry.com/agents/readability.openverbs.com)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "_source": "agentic.market",
  "service": {
    "id": "readability-openverbs-com",
    "name": "readability.openverbs.com",
    "description": "",
    "domain": "readability.openverbs.com",
    "provider": "readability.openverbs.com",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://readability.openverbs.com/v1/grade",
        "description": "Summarise a text's difficulty as a single consensus US grade level (averaging the five grade formulas), plus the Flesch Reading Ease, a plain-language difficulty band and an approximate age range.",
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "text",
            "type": "string",
            "description": "",
            "example": "example",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Consensus grade level",
        "tags": [
          "grade level estimate",
          "text difficulty grade",
          "reading grade level",
          "consensus readability grade",
          "age range readability"
        ],
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://readability.openverbs.com/v1/reading-time",
        "description": "Estimate reading and speaking time for a text at configurable words-per-minute rates (defaults: 200 wpm reading, 130 wpm speaking).",
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "readingWpm",
            "type": "number",
            "description": "",
            "example": 1,
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "speakingWpm",
            "type": "number",
            "description": "",
            "example": 1,
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "text",
            "type": "string",
            "description": "",
            "example": "example",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Reading & speaking time",
        "tags": [
          "reading time estimate",
          "speaking time estimate",
          "words per minute calculator",
          "estimate read time",
          "text duration api"
        ],
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://readability.openverbs.com/v1/score",
        "description": "Compute the standard English readability formulas \u2014 Flesch Reading Ease, Flesch\u2013Kincaid grade, Gunning fog, SMOG, Coleman\u2013Liau and ARI \u2014 along with the underlying sentence/word/syllable statistics. Empty text is a clean 400.",
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "text",
            "type": "string",
            "description": "",
            "example": "example",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Readability scores",
        "tags": [
          "readability score",
          "text readability api",
          "flesch score calculator",
          "reading ease analysis",
          "grade formula scores"
        ],
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://readability.openverbs.com/v1/syllables",
        "description": "Count syllables per word and in total across the text.",
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "text",
            "type": "string",
            "description": "",
            "example": "example",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Count syllables",
        "tags": [
          "count syllables",
          "syllable counter",
          "word syllable lookup",
          "text syllable count",
          "parse word syllables"
        ],
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "1"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.002",
      "maxAmount": "0.002",
      "avgCostPerTransaction": "0.002",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [
      "grade level estimate",
      "text difficulty grade",
      "reading grade level",
      "consensus readability grade",
      "age range readability",
      "reading time estimate",
      "speaking time estimate",
      "words per minute calculator",
      "estimate read time",
      "text duration api",
      "readability score",
      "text readability api",
      "flesch score calculator",
      "reading ease analysis",
      "grade formula scores",
      "count syllables",
      "syllable counter",
      "word syllable lookup",
      "text syllable count",
      "parse word syllables"
    ],
    "iconUrl": ""
  }
}

Activity (audit trail)

Endpoints

Health · last 0 probes

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Audit-grade evidence bundle

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